Basic harness for testing NIST problems.

Change-Id: I5baaa24dbf0506ceedf4a9be4ed17c84974d71a1
diff --git a/data/nist/Bennett5.dat b/data/nist/Bennett5.dat
new file mode 100644
index 0000000..eba218a
--- /dev/null
+++ b/data/nist/Bennett5.dat
@@ -0,0 +1,214 @@
+NIST/ITL StRD

+Dataset Name:  Bennett5          (Bennett5.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  43)

+               Certified Values  (lines 41 to  48)

+               Data              (lines 61 to 214)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               superconductivity magnetization modeling.  The

+               response variable is magnetism, and the predictor

+               variable is the log of time in minutes.

+

+Reference:     Bennett, L., L. Swartzendruber, and H. Brown, 

+               NIST (1994).  

+               Superconductivity Magnetization Modeling.

+

+

+

+

+

+

+Data:          1 Response Variable  (y = magnetism)

+               1 Predictor Variable (x = log[time])

+               154 Observations

+               Higher Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               3 Parameters (b1 to b3)

+

+               y = b1 * (b2+x)**(-1/b3)  +  e

+

+ 

+ 

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   -2000       -1500        -2.5235058043E+03  2.9715175411E+02

+  b2 =      50          45         4.6736564644E+01  1.2448871856E+00

+  b3 =       0.8         0.85      9.3218483193E-01  2.0272299378E-02

+

+Residual Sum of Squares:                    5.2404744073E-04

+Residual Standard Deviation:                1.8629312528E-03

+Degrees of Freedom:                               151

+Number of Observations:                           154

+

+

+

+

+

+

+

+

+

+

+

+Data:   y               x

+     -34.834702E0      7.447168E0

+     -34.393200E0      8.102586E0

+     -34.152901E0      8.452547E0

+     -33.979099E0      8.711278E0

+     -33.845901E0      8.916774E0

+     -33.732899E0      9.087155E0

+     -33.640301E0      9.232590E0

+     -33.559200E0      9.359535E0

+     -33.486801E0      9.472166E0

+     -33.423100E0      9.573384E0

+     -33.365101E0      9.665293E0

+     -33.313000E0      9.749461E0

+     -33.260899E0      9.827092E0

+     -33.217400E0      9.899128E0

+     -33.176899E0      9.966321E0

+     -33.139198E0     10.029280E0

+     -33.101601E0     10.088510E0

+     -33.066799E0     10.144430E0

+     -33.035000E0     10.197380E0

+     -33.003101E0     10.247670E0

+     -32.971298E0     10.295560E0

+     -32.942299E0     10.341250E0

+     -32.916302E0     10.384950E0

+     -32.890202E0     10.426820E0

+     -32.864101E0     10.467000E0

+     -32.841000E0     10.505640E0

+     -32.817799E0     10.542830E0

+     -32.797501E0     10.578690E0

+     -32.774300E0     10.613310E0

+     -32.757000E0     10.646780E0

+     -32.733799E0     10.679150E0

+     -32.716400E0     10.710520E0

+     -32.699100E0     10.740920E0

+     -32.678799E0     10.770440E0

+     -32.661400E0     10.799100E0

+     -32.644001E0     10.826970E0

+     -32.626701E0     10.854080E0

+     -32.612202E0     10.880470E0

+     -32.597698E0     10.906190E0

+     -32.583199E0     10.931260E0

+     -32.568699E0     10.955720E0

+     -32.554298E0     10.979590E0

+     -32.539799E0     11.002910E0

+     -32.525299E0     11.025700E0

+     -32.510799E0     11.047980E0

+     -32.499199E0     11.069770E0

+     -32.487598E0     11.091100E0

+     -32.473202E0     11.111980E0

+     -32.461601E0     11.132440E0

+     -32.435501E0     11.152480E0

+     -32.435501E0     11.172130E0

+     -32.426800E0     11.191410E0

+     -32.412300E0     11.210310E0

+     -32.400799E0     11.228870E0

+     -32.392101E0     11.247090E0

+     -32.380501E0     11.264980E0

+     -32.366001E0     11.282560E0

+     -32.357300E0     11.299840E0

+     -32.348598E0     11.316820E0

+     -32.339901E0     11.333520E0

+     -32.328400E0     11.349940E0

+     -32.319698E0     11.366100E0

+     -32.311001E0     11.382000E0

+     -32.299400E0     11.397660E0

+     -32.290699E0     11.413070E0

+     -32.282001E0     11.428240E0

+     -32.273300E0     11.443200E0

+     -32.264599E0     11.457930E0

+     -32.256001E0     11.472440E0

+     -32.247299E0     11.486750E0

+     -32.238602E0     11.500860E0

+     -32.229900E0     11.514770E0

+     -32.224098E0     11.528490E0

+     -32.215401E0     11.542020E0

+     -32.203800E0     11.555380E0

+     -32.198002E0     11.568550E0

+     -32.189400E0     11.581560E0

+     -32.183601E0     11.594420E0

+     -32.174900E0     11.607121E0

+     -32.169102E0     11.619640E0

+     -32.163300E0     11.632000E0

+     -32.154598E0     11.644210E0

+     -32.145901E0     11.656280E0

+     -32.140099E0     11.668200E0

+     -32.131401E0     11.679980E0

+     -32.125599E0     11.691620E0

+     -32.119801E0     11.703130E0

+     -32.111198E0     11.714510E0

+     -32.105400E0     11.725760E0

+     -32.096699E0     11.736880E0

+     -32.090900E0     11.747890E0

+     -32.088001E0     11.758780E0

+     -32.079300E0     11.769550E0

+     -32.073502E0     11.780200E0

+     -32.067699E0     11.790730E0

+     -32.061901E0     11.801160E0

+     -32.056099E0     11.811480E0

+     -32.050301E0     11.821700E0

+     -32.044498E0     11.831810E0

+     -32.038799E0     11.841820E0

+     -32.033001E0     11.851730E0

+     -32.027199E0     11.861550E0

+     -32.024300E0     11.871270E0

+     -32.018501E0     11.880890E0

+     -32.012699E0     11.890420E0

+     -32.004002E0     11.899870E0

+     -32.001099E0     11.909220E0

+     -31.995300E0     11.918490E0

+     -31.989500E0     11.927680E0

+     -31.983700E0     11.936780E0

+     -31.977900E0     11.945790E0

+     -31.972099E0     11.954730E0

+     -31.969299E0     11.963590E0

+     -31.963501E0     11.972370E0

+     -31.957701E0     11.981070E0

+     -31.951900E0     11.989700E0

+     -31.946100E0     11.998260E0

+     -31.940300E0     12.006740E0

+     -31.937401E0     12.015150E0

+     -31.931601E0     12.023490E0

+     -31.925800E0     12.031760E0

+     -31.922899E0     12.039970E0

+     -31.917101E0     12.048100E0

+     -31.911301E0     12.056170E0

+     -31.908400E0     12.064180E0

+     -31.902599E0     12.072120E0

+     -31.896900E0     12.080010E0

+     -31.893999E0     12.087820E0

+     -31.888201E0     12.095580E0

+     -31.885300E0     12.103280E0

+     -31.882401E0     12.110920E0

+     -31.876600E0     12.118500E0

+     -31.873699E0     12.126030E0

+     -31.867901E0     12.133500E0

+     -31.862101E0     12.140910E0

+     -31.859200E0     12.148270E0

+     -31.856300E0     12.155570E0

+     -31.850500E0     12.162830E0

+     -31.844700E0     12.170030E0

+     -31.841801E0     12.177170E0

+     -31.838900E0     12.184270E0

+     -31.833099E0     12.191320E0

+     -31.830200E0     12.198320E0

+     -31.827299E0     12.205270E0

+     -31.821600E0     12.212170E0

+     -31.818701E0     12.219030E0

+     -31.812901E0     12.225840E0

+     -31.809999E0     12.232600E0

+     -31.807100E0     12.239320E0

+     -31.801300E0     12.245990E0

+     -31.798401E0     12.252620E0

+     -31.795500E0     12.259200E0

+     -31.789700E0     12.265750E0

+     -31.786800E0     12.272240E0

diff --git a/data/nist/BoxBOD.dat b/data/nist/BoxBOD.dat
new file mode 100644
index 0000000..6a742fd
--- /dev/null
+++ b/data/nist/BoxBOD.dat
@@ -0,0 +1,66 @@
+NIST/ITL StRD

+Dataset Name:  BoxBOD            (BoxBOD.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 42)

+               Certified Values  (lines 41 to 47)

+               Data              (lines 61 to 66)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are described in detail in Box, Hunter and

+               Hunter (1978).  The response variable is biochemical

+               oxygen demand (BOD) in mg/l, and the predictor

+               variable is incubation time in days.

+

+

+Reference:     Box, G. P., W. G. Hunter, and J. S. Hunter (1978).

+               Statistics for Experimenters.  

+               New York, NY: Wiley, pp. 483-487.

+

+

+

+

+

+Data:          1 Response  (y = biochemical oxygen demand)

+               1 Predictor (x = incubation time)

+               6 Observations

+               Higher Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               2 Parameters (b1 and b2)

+

+               y = b1*(1-exp[-b2*x])  +  e

+

+

+ 

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   1           100           2.1380940889E+02  1.2354515176E+01

+  b2 =   1             0.75        5.4723748542E-01  1.0455993237E-01

+

+Residual Sum of Squares:                    1.1680088766E+03

+Residual Standard Deviation:                1.7088072423E+01

+Degrees of Freedom:                                4

+Number of Observations:                            6  

+

+

+

+

+

+

+

+

+

+

+

+

+Data:   y             x

+      109             1

+      149             2

+      149             3

+      191             5

+      213             7

+      224            10

diff --git a/data/nist/Chwirut1.dat b/data/nist/Chwirut1.dat
new file mode 100644
index 0000000..4ad8aa5
--- /dev/null
+++ b/data/nist/Chwirut1.dat
@@ -0,0 +1,274 @@
+NIST/ITL StRD

+Dataset Name:  Chwirut1          (Chwirut1.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  43)

+               Certified Values  (lines 41 to  48)

+               Data              (lines 61 to 274)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               ultrasonic calibration.  The response variable is

+               ultrasonic response, and the predictor variable is

+               metal distance.

+

+Reference:     Chwirut, D., NIST (197?).  

+               Ultrasonic Reference Block Study. 

+

+

+

+

+

+

+

+Data:          1 Response Variable  (y = ultrasonic response)

+               1 Predictor Variable (x = metal distance)

+               214 Observations

+               Lower Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               3 Parameters (b1 to b3)

+

+               y = exp[-b1*x]/(b2+b3*x)  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   0.1         0.15          1.9027818370E-01  2.1938557035E-02

+  b2 =   0.01        0.008         6.1314004477E-03  3.4500025051E-04

+  b3 =   0.02        0.010         1.0530908399E-02  7.9281847748E-04

+

+Residual Sum of Squares:                    2.3844771393E+03

+Residual Standard Deviation:                3.3616721320E+00

+Degrees of Freedom:                               211

+Number of Observations:                           214

+

+

+

+

+

+

+

+

+

+

+

+Data:  y            x

+     92.9000E0     0.5000E0

+     78.7000E0     0.6250E0

+     64.2000E0     0.7500E0

+     64.9000E0     0.8750E0

+     57.1000E0     1.0000E0

+     43.3000E0     1.2500E0

+     31.1000E0     1.7500E0

+     23.6000E0     2.2500E0

+     31.0500E0     1.7500E0

+     23.7750E0     2.2500E0

+     17.7375E0     2.7500E0

+     13.8000E0     3.2500E0

+     11.5875E0     3.7500E0

+      9.4125E0     4.2500E0

+      7.7250E0     4.7500E0

+      7.3500E0     5.2500E0

+      8.0250E0     5.7500E0

+     90.6000E0     0.5000E0

+     76.9000E0     0.6250E0

+     71.6000E0     0.7500E0

+     63.6000E0     0.8750E0

+     54.0000E0     1.0000E0

+     39.2000E0     1.2500E0

+     29.3000E0     1.7500E0

+     21.4000E0     2.2500E0

+     29.1750E0     1.7500E0

+     22.1250E0     2.2500E0

+     17.5125E0     2.7500E0

+     14.2500E0     3.2500E0

+      9.4500E0     3.7500E0

+      9.1500E0     4.2500E0

+      7.9125E0     4.7500E0

+      8.4750E0     5.2500E0

+      6.1125E0     5.7500E0

+     80.0000E0     0.5000E0

+     79.0000E0     0.6250E0

+     63.8000E0     0.7500E0

+     57.2000E0     0.8750E0

+     53.2000E0     1.0000E0

+     42.5000E0     1.2500E0

+     26.8000E0     1.7500E0

+     20.4000E0     2.2500E0

+     26.8500E0     1.7500E0

+     21.0000E0     2.2500E0

+     16.4625E0     2.7500E0

+     12.5250E0     3.2500E0

+     10.5375E0     3.7500E0

+      8.5875E0     4.2500E0

+      7.1250E0     4.7500E0

+      6.1125E0     5.2500E0

+      5.9625E0     5.7500E0

+     74.1000E0     0.5000E0

+     67.3000E0     0.6250E0

+     60.8000E0     0.7500E0

+     55.5000E0     0.8750E0

+     50.3000E0     1.0000E0

+     41.0000E0     1.2500E0

+     29.4000E0     1.7500E0

+     20.4000E0     2.2500E0

+     29.3625E0     1.7500E0

+     21.1500E0     2.2500E0

+     16.7625E0     2.7500E0

+     13.2000E0     3.2500E0

+     10.8750E0     3.7500E0

+      8.1750E0     4.2500E0

+      7.3500E0     4.7500E0

+      5.9625E0     5.2500E0

+      5.6250E0     5.7500E0

+     81.5000E0      .5000E0

+     62.4000E0      .7500E0

+     32.5000E0     1.5000E0

+     12.4100E0     3.0000E0

+     13.1200E0     3.0000E0

+     15.5600E0     3.0000E0

+      5.6300E0     6.0000E0

+     78.0000E0      .5000E0

+     59.9000E0      .7500E0

+     33.2000E0     1.5000E0

+     13.8400E0     3.0000E0

+     12.7500E0     3.0000E0

+     14.6200E0     3.0000E0

+      3.9400E0     6.0000E0

+     76.8000E0      .5000E0

+     61.0000E0      .7500E0

+     32.9000E0     1.5000E0

+     13.8700E0     3.0000E0

+     11.8100E0     3.0000E0

+     13.3100E0     3.0000E0

+      5.4400E0     6.0000E0

+     78.0000E0      .5000E0

+     63.5000E0      .7500E0

+     33.8000E0     1.5000E0

+     12.5600E0     3.0000E0

+      5.6300E0     6.0000E0

+     12.7500E0     3.0000E0

+     13.1200E0     3.0000E0

+      5.4400E0     6.0000E0

+     76.8000E0      .5000E0

+     60.0000E0      .7500E0

+     47.8000E0     1.0000E0

+     32.0000E0     1.5000E0

+     22.2000E0     2.0000E0

+     22.5700E0     2.0000E0

+     18.8200E0     2.5000E0

+     13.9500E0     3.0000E0

+     11.2500E0     4.0000E0

+      9.0000E0     5.0000E0

+      6.6700E0     6.0000E0

+     75.8000E0      .5000E0

+     62.0000E0      .7500E0

+     48.8000E0     1.0000E0

+     35.2000E0     1.5000E0

+     20.0000E0     2.0000E0

+     20.3200E0     2.0000E0

+     19.3100E0     2.5000E0

+     12.7500E0     3.0000E0

+     10.4200E0     4.0000E0

+      7.3100E0     5.0000E0

+      7.4200E0     6.0000E0

+     70.5000E0      .5000E0

+     59.5000E0      .7500E0

+     48.5000E0     1.0000E0

+     35.8000E0     1.5000E0

+     21.0000E0     2.0000E0

+     21.6700E0     2.0000E0

+     21.0000E0     2.5000E0

+     15.6400E0     3.0000E0

+      8.1700E0     4.0000E0

+      8.5500E0     5.0000E0

+     10.1200E0     6.0000E0

+     78.0000E0      .5000E0

+     66.0000E0      .6250E0

+     62.0000E0      .7500E0

+     58.0000E0      .8750E0

+     47.7000E0     1.0000E0

+     37.8000E0     1.2500E0

+     20.2000E0     2.2500E0

+     21.0700E0     2.2500E0

+     13.8700E0     2.7500E0

+      9.6700E0     3.2500E0

+      7.7600E0     3.7500E0

+      5.4400E0     4.2500E0

+      4.8700E0     4.7500E0

+      4.0100E0     5.2500E0

+      3.7500E0     5.7500E0

+     24.1900E0     3.0000E0

+     25.7600E0     3.0000E0

+     18.0700E0     3.0000E0

+     11.8100E0     3.0000E0

+     12.0700E0     3.0000E0

+     16.1200E0     3.0000E0

+     70.8000E0      .5000E0

+     54.7000E0      .7500E0

+     48.0000E0     1.0000E0

+     39.8000E0     1.5000E0

+     29.8000E0     2.0000E0

+     23.7000E0     2.5000E0

+     29.6200E0     2.0000E0

+     23.8100E0     2.5000E0

+     17.7000E0     3.0000E0

+     11.5500E0     4.0000E0

+     12.0700E0     5.0000E0

+      8.7400E0     6.0000E0

+     80.7000E0      .5000E0

+     61.3000E0      .7500E0

+     47.5000E0     1.0000E0

+     29.0000E0     1.5000E0

+     24.0000E0     2.0000E0

+     17.7000E0     2.5000E0

+     24.5600E0     2.0000E0

+     18.6700E0     2.5000E0

+     16.2400E0     3.0000E0

+      8.7400E0     4.0000E0

+      7.8700E0     5.0000E0

+      8.5100E0     6.0000E0

+     66.7000E0      .5000E0

+     59.2000E0      .7500E0

+     40.8000E0     1.0000E0

+     30.7000E0     1.5000E0

+     25.7000E0     2.0000E0

+     16.3000E0     2.5000E0

+     25.9900E0     2.0000E0

+     16.9500E0     2.5000E0

+     13.3500E0     3.0000E0

+      8.6200E0     4.0000E0

+      7.2000E0     5.0000E0

+      6.6400E0     6.0000E0

+     13.6900E0     3.0000E0

+     81.0000E0      .5000E0

+     64.5000E0      .7500E0

+     35.5000E0     1.5000E0

+     13.3100E0     3.0000E0

+      4.8700E0     6.0000E0

+     12.9400E0     3.0000E0

+      5.0600E0     6.0000E0

+     15.1900E0     3.0000E0

+     14.6200E0     3.0000E0

+     15.6400E0     3.0000E0

+     25.5000E0     1.7500E0

+     25.9500E0     1.7500E0

+     81.7000E0      .5000E0

+     61.6000E0      .7500E0

+     29.8000E0     1.7500E0

+     29.8100E0     1.7500E0

+     17.1700E0     2.7500E0

+     10.3900E0     3.7500E0

+     28.4000E0     1.7500E0

+     28.6900E0     1.7500E0

+     81.3000E0      .5000E0

+     60.9000E0      .7500E0

+     16.6500E0     2.7500E0

+     10.0500E0     3.7500E0

+     28.9000E0     1.7500E0

+     28.9500E0     1.7500E0

diff --git a/data/nist/Chwirut2.dat b/data/nist/Chwirut2.dat
new file mode 100644
index 0000000..03703de
--- /dev/null
+++ b/data/nist/Chwirut2.dat
@@ -0,0 +1,114 @@
+NIST/ITL StRD

+Dataset Name:  Chwirut2          (Chwirut2.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  43)

+               Certified Values  (lines 41 to  48)

+               Data              (lines 61 to 114)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               ultrasonic calibration.  The response variable is

+               ultrasonic response, and the predictor variable is

+               metal distance.

+

+

+

+Reference:     Chwirut, D., NIST (197?).  

+               Ultrasonic Reference Block Study. 

+

+

+

+

+

+Data:          1 Response  (y = ultrasonic response)

+               1 Predictor (x = metal distance)

+               54 Observations

+               Lower Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               3 Parameters (b1 to b3)

+

+               y = exp(-b1*x)/(b2+b3*x)  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   0.1         0.15          1.6657666537E-01  3.8303286810E-02

+  b2 =   0.01        0.008         5.1653291286E-03  6.6621605126E-04

+  b3 =   0.02        0.010         1.2150007096E-02  1.5304234767E-03

+

+Residual Sum of Squares:                    5.1304802941E+02

+Residual Standard Deviation:                3.1717133040E+00

+Degrees of Freedom:                                51

+Number of Observations:                            54

+

+

+

+

+

+

+

+

+

+ 

+

+Data:  y             x

+      92.9000E0     0.500E0

+      57.1000E0     1.000E0

+      31.0500E0     1.750E0

+      11.5875E0     3.750E0

+       8.0250E0     5.750E0

+      63.6000E0     0.875E0

+      21.4000E0     2.250E0

+      14.2500E0     3.250E0

+       8.4750E0     5.250E0

+      63.8000E0     0.750E0

+      26.8000E0     1.750E0

+      16.4625E0     2.750E0

+       7.1250E0     4.750E0

+      67.3000E0     0.625E0

+      41.0000E0     1.250E0

+      21.1500E0     2.250E0

+       8.1750E0     4.250E0

+      81.5000E0      .500E0

+      13.1200E0     3.000E0

+      59.9000E0      .750E0

+      14.6200E0     3.000E0

+      32.9000E0     1.500E0

+       5.4400E0     6.000E0

+      12.5600E0     3.000E0

+       5.4400E0     6.000E0

+      32.0000E0     1.500E0

+      13.9500E0     3.000E0

+      75.8000E0      .500E0

+      20.0000E0     2.000E0

+      10.4200E0     4.000E0

+      59.5000E0      .750E0

+      21.6700E0     2.000E0

+       8.5500E0     5.000E0

+      62.0000E0      .750E0

+      20.2000E0     2.250E0

+       7.7600E0     3.750E0

+       3.7500E0     5.750E0

+      11.8100E0     3.000E0

+      54.7000E0      .750E0

+      23.7000E0     2.500E0

+      11.5500E0     4.000E0

+      61.3000E0      .750E0

+      17.7000E0     2.500E0

+       8.7400E0     4.000E0

+      59.2000E0      .750E0

+      16.3000E0     2.500E0

+       8.6200E0     4.000E0

+      81.0000E0      .500E0

+       4.8700E0     6.000E0

+      14.6200E0     3.000E0

+      81.7000E0      .500E0

+      17.1700E0     2.750E0

+      81.3000E0      .500E0

+      28.9000E0     1.750E0

diff --git a/data/nist/DanWood.dat b/data/nist/DanWood.dat
new file mode 100644
index 0000000..479a9bd
--- /dev/null
+++ b/data/nist/DanWood.dat
@@ -0,0 +1,66 @@
+NIST/ITL StRD

+Dataset Name:  DanWood           (DanWood.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 42)

+               Certified Values  (lines 41 to 47)

+               Data              (lines 61 to 66)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data and model are described in Daniel and Wood

+               (1980), and originally published in E.S.Keeping, 

+               "Introduction to Statistical Inference," Van Nostrand

+               Company, Princeton, NJ, 1962, p. 354.  The response

+               variable is energy radieted from a carbon filament

+               lamp per cm**2 per second, and the predictor variable

+               is the absolute temperature of the filament in 1000

+               degrees Kelvin.

+

+Reference:     Daniel, C. and F. S. Wood (1980).

+               Fitting Equations to Data, Second Edition. 

+               New York, NY:  John Wiley and Sons, pp. 428-431.

+

+

+Data:          1 Response Variable  (y = energy)

+               1 Predictor Variable (x = temperature)

+               6 Observations

+               Lower Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               2 Parameters (b1 and b2)

+

+               y  = b1*x**b2  +  e

+

+

+ 

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   1           0.7           7.6886226176E-01  1.8281973860E-02

+  b2 =   5           4             3.8604055871E+00  5.1726610913E-02

+ 

+Residual Sum of Squares:                    4.3173084083E-03

+Residual Standard Deviation:                3.2853114039E-02

+Degrees of Freedom:                                4

+Number of Observations:                            6 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+Data:  y              x

+      2.138E0        1.309E0

+      3.421E0        1.471E0

+      3.597E0        1.490E0

+      4.340E0        1.565E0

+      4.882E0        1.611E0

+      5.660E0        1.680E0

diff --git a/data/nist/ENSO.dat b/data/nist/ENSO.dat
new file mode 100644
index 0000000..f374db2
--- /dev/null
+++ b/data/nist/ENSO.dat
@@ -0,0 +1,228 @@
+NIST/ITL StRD

+Dataset Name:  ENSO              (ENSO.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  49)

+               Certified Values  (lines 41 to  54)

+               Data              (lines 61 to 228)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   The data are monthly averaged atmospheric pressure 

+               differences between Easter Island and Darwin, 

+               Australia.  This difference drives the trade winds in 

+               the southern hemisphere.  Fourier analysis of the data

+               reveals 3 significant cycles.  The annual cycle is the

+               strongest, but cycles with periods of approximately 44

+               and 26 months are also present.  These cycles

+               correspond to the El Nino and the Southern Oscillation.

+               Arguments to the SIN and COS functions are in radians.

+

+Reference:     Kahaner, D., C. Moler, and S. Nash, (1989). 

+               Numerical Methods and Software.  

+               Englewood Cliffs, NJ: Prentice Hall, pp. 441-445.

+

+Data:          1 Response  (y = atmospheric pressure)

+               1 Predictor (x = time)

+               168 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               9 Parameters (b1 to b9)

+

+               y = b1 + b2*cos( 2*pi*x/12 ) + b3*sin( 2*pi*x/12 ) 

+                      + b5*cos( 2*pi*x/b4 ) + b6*sin( 2*pi*x/b4 )

+                      + b8*cos( 2*pi*x/b7 ) + b9*sin( 2*pi*x/b7 )  + e

+ 

+          Starting values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   11.0        10.0          1.0510749193E+01  1.7488832467E-01

+  b2 =    3.0         3.0          3.0762128085E+00  2.4310052139E-01

+  b3 =    0.5         0.5          5.3280138227E-01  2.4354686618E-01

+  b4 =   40.0        44.0          4.4311088700E+01  9.4408025976E-01

+  b5 =   -0.7        -1.5         -1.6231428586E+00  2.8078369611E-01

+  b6 =   -1.3         0.5          5.2554493756E-01  4.8073701119E-01

+  b7 =   25.0        26.0          2.6887614440E+01  4.1612939130E-01

+  b8 =   -0.3        -0.1          2.1232288488E-01  5.1460022911E-01

+  b9 =    1.4         1.5          1.4966870418E+00  2.5434468893E-01

+

+Residual Sum of Squares:                    7.8853978668E+02

+Residual Standard Deviation:                2.2269642403E+00

+Degrees of Freedom:                               159

+Number of Observations:                           168

+

+

+

+

+

+Data:   y          x

+    12.90000    1.000000

+    11.30000    2.000000

+    10.60000    3.000000

+    11.20000    4.000000

+    10.90000    5.000000

+    7.500000    6.000000

+    7.700000    7.000000

+    11.70000    8.000000

+    12.90000    9.000000

+    14.30000   10.000000

+    10.90000    11.00000

+    13.70000    12.00000

+    17.10000    13.00000

+    14.00000    14.00000

+    15.30000    15.00000

+    8.500000    16.00000

+    5.700000    17.00000

+    5.500000    18.00000

+    7.600000    19.00000

+    8.600000    20.00000

+    7.300000    21.00000

+    7.600000    22.00000

+    12.70000    23.00000

+    11.00000    24.00000

+    12.70000    25.00000

+    12.90000    26.00000

+    13.00000    27.00000

+    10.90000    28.00000

+   10.400000    29.00000

+   10.200000    30.00000

+    8.000000    31.00000

+    10.90000    32.00000

+    13.60000    33.00000

+   10.500000    34.00000

+    9.200000    35.00000

+    12.40000    36.00000

+    12.70000    37.00000

+    13.30000    38.00000

+   10.100000    39.00000

+    7.800000    40.00000

+    4.800000    41.00000

+    3.000000    42.00000

+    2.500000    43.00000

+    6.300000    44.00000

+    9.700000    45.00000

+    11.60000    46.00000

+    8.600000    47.00000

+    12.40000    48.00000

+   10.500000    49.00000

+    13.30000    50.00000

+   10.400000    51.00000

+    8.100000    52.00000

+    3.700000    53.00000

+    10.70000    54.00000

+    5.100000    55.00000

+   10.400000    56.00000

+    10.90000    57.00000

+    11.70000    58.00000

+    11.40000    59.00000

+    13.70000    60.00000

+    14.10000    61.00000

+    14.00000    62.00000

+    12.50000    63.00000

+    6.300000    64.00000

+    9.600000    65.00000

+    11.70000    66.00000

+    5.000000    67.00000

+    10.80000    68.00000

+    12.70000    69.00000

+    10.80000    70.00000

+    11.80000    71.00000

+    12.60000    72.00000

+    15.70000    73.00000

+    12.60000    74.00000

+    14.80000    75.00000

+    7.800000    76.00000

+    7.100000    77.00000

+    11.20000    78.00000

+    8.100000    79.00000

+    6.400000    80.00000

+    5.200000    81.00000

+    12.00000    82.00000

+   10.200000    83.00000

+    12.70000    84.00000

+   10.200000    85.00000

+    14.70000    86.00000

+    12.20000    87.00000

+    7.100000    88.00000

+    5.700000    89.00000

+    6.700000    90.00000

+    3.900000    91.00000

+    8.500000    92.00000

+    8.300000    93.00000

+    10.80000    94.00000

+    16.70000    95.00000

+    12.60000    96.00000

+    12.50000    97.00000

+    12.50000    98.00000

+    9.800000    99.00000

+    7.200000   100.00000

+    4.100000   101.00000

+    10.60000   102.00000

+   10.100000   103.00000

+   10.100000   104.00000

+    11.90000   105.00000

+    13.60000    106.0000

+    16.30000    107.0000

+    17.60000    108.0000

+    15.50000    109.0000

+    16.00000    110.0000

+    15.20000    111.0000

+    11.20000    112.0000

+    14.30000    113.0000

+    14.50000    114.0000

+    8.500000    115.0000

+    12.00000    116.0000

+    12.70000    117.0000

+    11.30000    118.0000

+    14.50000    119.0000

+    15.10000    120.0000

+   10.400000    121.0000

+    11.50000    122.0000

+    13.40000    123.0000

+    7.500000    124.0000

+   0.6000000    125.0000

+   0.3000000    126.0000

+    5.500000    127.0000

+    5.000000    128.0000

+    4.600000    129.0000

+    8.200000    130.0000

+    9.900000    131.0000

+    9.200000    132.0000

+    12.50000    133.0000

+    10.90000    134.0000

+    9.900000    135.0000

+    8.900000    136.0000

+    7.600000    137.0000

+    9.500000    138.0000

+    8.400000    139.0000

+    10.70000    140.0000

+    13.60000    141.0000

+    13.70000    142.0000

+    13.70000    143.0000

+    16.50000    144.0000

+    16.80000    145.0000

+    17.10000    146.0000

+    15.40000    147.0000

+    9.500000    148.0000

+    6.100000    149.0000

+   10.100000    150.0000

+    9.300000    151.0000

+    5.300000    152.0000

+    11.20000    153.0000

+    16.60000    154.0000

+    15.60000    155.0000

+    12.00000    156.0000

+    11.50000    157.0000

+    8.600000    158.0000

+    13.80000    159.0000

+    8.700000    160.0000

+    8.600000    161.0000

+    8.600000    162.0000

+    8.700000    163.0000

+    12.80000    164.0000

+    13.20000    165.0000

+    14.00000    166.0000

+    13.40000    167.0000

+    14.80000    168.0000

diff --git a/data/nist/Eckerle4.dat b/data/nist/Eckerle4.dat
new file mode 100644
index 0000000..2d0d8bf
--- /dev/null
+++ b/data/nist/Eckerle4.dat
@@ -0,0 +1,95 @@
+NIST/ITL StRD

+Dataset Name:  Eckerle4          (Eckerle4.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 43)

+               Certified Values  (lines 41 to 48)

+               Data              (lines 61 to 95)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               circular interference transmittance.  The response

+               variable is transmittance, and the predictor variable

+               is wavelength.

+

+

+Reference:     Eckerle, K., NIST (197?).  

+               Circular Interference Transmittance Study.

+

+

+

+

+

+

+Data:          1 Response Variable  (y = transmittance)

+               1 Predictor Variable (x = wavelength)

+               35 Observations

+               Higher Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               3 Parameters (b1 to b3)

+

+               y = (b1/b2) * exp[-0.5*((x-b3)/b2)**2]  +  e

+

+

+

+          Starting values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =     1           1.5         1.5543827178E+00  1.5408051163E-02

+  b2 =    10           5           4.0888321754E+00  4.6803020753E-02

+  b3 =   500         450           4.5154121844E+02  4.6800518816E-02

+

+Residual Sum of Squares:                    1.4635887487E-03

+Residual Standard Deviation:                6.7629245447E-03

+Degrees of Freedom:                                32

+Number of Observations:                            35

+

+

+

+

+

+

+

+

+

+

+

+Data:  y                x

+      0.0001575E0    400.000000E0

+      0.0001699E0    405.000000E0

+      0.0002350E0    410.000000E0

+      0.0003102E0    415.000000E0

+      0.0004917E0    420.000000E0

+      0.0008710E0    425.000000E0

+      0.0017418E0    430.000000E0

+      0.0046400E0    435.000000E0

+      0.0065895E0    436.500000E0

+      0.0097302E0    438.000000E0

+      0.0149002E0    439.500000E0

+      0.0237310E0    441.000000E0

+      0.0401683E0    442.500000E0

+      0.0712559E0    444.000000E0

+      0.1264458E0    445.500000E0

+      0.2073413E0    447.000000E0

+      0.2902366E0    448.500000E0

+      0.3445623E0    450.000000E0

+      0.3698049E0    451.500000E0

+      0.3668534E0    453.000000E0

+      0.3106727E0    454.500000E0

+      0.2078154E0    456.000000E0

+      0.1164354E0    457.500000E0

+      0.0616764E0    459.000000E0

+      0.0337200E0    460.500000E0

+      0.0194023E0    462.000000E0

+      0.0117831E0    463.500000E0

+      0.0074357E0    465.000000E0

+      0.0022732E0    470.000000E0

+      0.0008800E0    475.000000E0

+      0.0004579E0    480.000000E0

+      0.0002345E0    485.000000E0

+      0.0001586E0    490.000000E0

+      0.0001143E0    495.000000E0

+      0.0000710E0    500.000000E0

diff --git a/data/nist/Gauss1.dat b/data/nist/Gauss1.dat
new file mode 100644
index 0000000..df8dfac
--- /dev/null
+++ b/data/nist/Gauss1.dat
@@ -0,0 +1,310 @@
+NIST/ITL StRD

+Dataset Name:  Gauss1            (Gauss1.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  48)

+               Certified Values  (lines 41 to  53)

+               Data              (lines 61 to 310)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   The data are two well-separated Gaussians on a 

+               decaying exponential baseline plus normally 

+               distributed zero-mean noise with variance = 6.25.

+

+Reference:     Rust, B., NIST (1996).

+

+

+

+

+

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               250 Observations

+               Lower Level of Difficulty

+               Generated Data

+ 

+Model:         Exponential Class

+               8 Parameters (b1 to b8) 

+ 

+               y = b1*exp( -b2*x ) + b3*exp( -(x-b4)**2 / b5**2 )

+                                   + b6*exp( -(x-b7)**2 / b8**2 ) + e

+ 

+ 

+          Starting values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =    97.0        94.0         9.8778210871E+01  5.7527312730E-01

+  b2 =     0.009       0.0105      1.0497276517E-02  1.1406289017E-04

+  b3 =   100.0        99.0         1.0048990633E+02  5.8831775752E-01

+  b4 =    65.0        63.0         6.7481111276E+01  1.0460593412E-01

+  b5 =    20.0        25.0         2.3129773360E+01  1.7439951146E-01

+  b6 =    70.0        71.0         7.1994503004E+01  6.2622793913E-01

+  b7 =   178.0       180.0         1.7899805021E+02  1.2436988217E-01

+  b8 =    16.5        20.0         1.8389389025E+01  2.0134312832E-01

+

+Residual Sum of Squares:                    1.3158222432E+03

+Residual Standard Deviation:                2.3317980180E+00

+Degrees of Freedom:                               242

+Number of Observations:                           250

+

+

+

+

+ 

+

+Data:   y          x

+    97.62227    1.000000

+    97.80724    2.000000

+    96.62247    3.000000

+    92.59022    4.000000

+    91.23869    5.000000

+    95.32704    6.000000

+    90.35040    7.000000

+    89.46235    8.000000

+    91.72520    9.000000

+    89.86916   10.000000

+    86.88076    11.00000

+    85.94360    12.00000

+    87.60686    13.00000

+    86.25839    14.00000

+    80.74976    15.00000

+    83.03551    16.00000

+    88.25837    17.00000

+    82.01316    18.00000

+    82.74098    19.00000

+    83.30034    20.00000

+    81.27850    21.00000

+    81.85506    22.00000

+    80.75195    23.00000

+    80.09573    24.00000

+    81.07633    25.00000

+    78.81542    26.00000

+    78.38596    27.00000

+    79.93386    28.00000

+    79.48474    29.00000

+    79.95942    30.00000

+    76.10691    31.00000

+    78.39830    32.00000

+    81.43060    33.00000

+    82.48867    34.00000

+    81.65462    35.00000

+    80.84323    36.00000

+    88.68663    37.00000

+    84.74438    38.00000

+    86.83934    39.00000

+    85.97739    40.00000

+    91.28509    41.00000

+    97.22411    42.00000

+    93.51733    43.00000

+    94.10159    44.00000

+   101.91760    45.00000

+    98.43134    46.00000

+    110.4214    47.00000

+    107.6628    48.00000

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diff --git a/data/nist/Gauss2.dat b/data/nist/Gauss2.dat
new file mode 100644
index 0000000..38222eb
--- /dev/null
+++ b/data/nist/Gauss2.dat
@@ -0,0 +1,310 @@
+NIST/ITL StRD

+Dataset Name:  Gauss2            (Gauss2.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  48)

+               Certified Values  (lines 41 to  53)

+               Data              (lines 61 to 310)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   The data are two slightly-blended Gaussians on a 

+               decaying exponential baseline plus normally 

+               distributed zero-mean noise with variance = 6.25. 

+

+Reference:     Rust, B., NIST (1996). 

+

+

+

+

+

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               250 Observations

+               Lower Level of Difficulty

+               Generated Data

+

+Model:         Exponential Class

+               8 Parameters (b1 to b8)

+

+               y = b1*exp( -b2*x ) + b3*exp( -(x-b4)**2 / b5**2 ) 

+                                   + b6*exp( -(x-b7)**2 / b8**2 ) + e

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =    96.0        98.0         9.9018328406E+01  5.3748766879E-01

+  b2 =     0.009       0.0105      1.0994945399E-02  1.3335306766E-04

+  b3 =   103.0       103.0         1.0188022528E+02  5.9217315772E-01

+  b4 =   106.0       105.0         1.0703095519E+02  1.5006798316E-01

+  b5 =    18.0        20.0         2.3578584029E+01  2.2695595067E-01

+  b6 =    72.0        73.0         7.2045589471E+01  6.1721965884E-01

+  b7 =   151.0       150.0         1.5327010194E+02  1.9466674341E-01

+  b8 =    18.0        20.0         1.9525972636E+01  2.6416549393E-01

+

+Residual Sum of Squares:                    1.2475282092E+03

+Residual Standard Deviation:                2.2704790782E+00

+Degrees of Freedom:                               242

+Number of Observations:                           250

+

+

+

+

+

+ 

+Data:   y          x

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diff --git a/data/nist/Gauss3.dat b/data/nist/Gauss3.dat
new file mode 100644
index 0000000..e5eb56d
--- /dev/null
+++ b/data/nist/Gauss3.dat
@@ -0,0 +1,310 @@
+NIST/ITL StRD

+Dataset Name:  Gauss3            (Gauss3.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  48)

+               Certified Values  (lines 41 to  53)

+               Data              (lines 61 to 310)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   The data are two strongly-blended Gaussians on a 

+               decaying exponential baseline plus normally 

+               distributed zero-mean noise with variance = 6.25.

+

+Reference:     Rust, B., NIST (1996).

+

+

+

+

+

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               250 Observations

+               Average Level of Difficulty

+               Generated Data

+

+Model:         Exponential Class

+               8 Parameters (b1 to b8)

+

+               y = b1*exp( -b2*x ) + b3*exp( -(x-b4)**2 / b5**2 )

+                                   + b6*exp( -(x-b7)**2 / b8**2 ) + e

+ 

+ 

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =    94.9        96.0         9.8940368970E+01  5.3005192833E-01

+  b2 =     0.009       0.0096      1.0945879335E-02  1.2554058911E-04

+  b3 =    90.1        80.0         1.0069553078E+02  8.1256587317E-01

+  b4 =   113.0       110.0         1.1163619459E+02  3.5317859757E-01

+  b5 =    20.0        25.0         2.3300500029E+01  3.6584783023E-01

+  b6 =    73.8        74.0         7.3705031418E+01  1.2091239082E+00

+  b7 =   140.0       139.0         1.4776164251E+02  4.0488183351E-01

+  b8 =    20.0        25.0         1.9668221230E+01  3.7806634336E-01

+

+Residual Sum of Squares:                    1.2444846360E+03  

+Residual Standard Deviation:                2.2677077625E+00

+Degrees of Freedom:                               242

+Number of Observations:                           250

+

+

+

+

+

+

+Data:   y          x

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+    97.76344    2.000000

+    96.56705    3.000000

+    92.52037    4.000000

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+    76.21241    89.00000

+    78.06311    90.00000

+    75.37701    91.00000

+    87.54449    92.00000

+    89.50588    93.00000

+    95.82098    94.00000

+    97.48390    95.00000

+   100.86070    96.00000

+   102.48510    97.00000

+    105.7311    98.00000

+    111.3489    99.00000

+    111.0305   100.00000

+    110.1920   101.00000

+    118.3581   102.00000

+    118.8086   103.00000

+    122.4249   104.00000

+    124.0953   105.00000

+    125.9337    106.0000

+    127.8533    107.0000

+    131.0361    108.0000

+    133.3343    109.0000

+    135.1278    110.0000

+    131.7113    111.0000

+    131.9151    112.0000

+    132.1107    113.0000

+    127.6898    114.0000

+    133.2148    115.0000

+    128.2296    116.0000

+    133.5902    117.0000

+    127.2539    118.0000

+    128.3482    119.0000

+    124.8694    120.0000

+    124.6031    121.0000

+    117.0648    122.0000

+    118.1966    123.0000

+    119.5408    124.0000

+    114.7946    125.0000

+    114.2780    126.0000

+    120.3484    127.0000

+    114.8647    128.0000

+    111.6514    129.0000

+    110.1826    130.0000

+    108.4461    131.0000

+    109.0571    132.0000

+    106.5308    133.0000

+    109.4691    134.0000

+    106.8709    135.0000

+    107.3192    136.0000

+    106.9000    137.0000

+    109.6526    138.0000

+    107.1602    139.0000

+    108.2509    140.0000

+   104.96310    141.0000

+    109.3601    142.0000

+    107.6696    143.0000

+    99.77286    144.0000

+   104.96440    145.0000

+    106.1376    146.0000

+    106.5816    147.0000

+   100.12860    148.0000

+   101.66910    149.0000

+    96.44254    150.0000

+    97.34169    151.0000

+    96.97412    152.0000

+    90.73460    153.0000

+    93.37949    154.0000

+    82.12331    155.0000

+    83.01657    156.0000

+    78.87360    157.0000

+    74.86971    158.0000

+    72.79341    159.0000

+    65.14744    160.0000

+    67.02127    161.0000

+    60.16136    162.0000

+    57.13996    163.0000

+    54.05769    164.0000

+    50.42265    165.0000

+    47.82430    166.0000

+    42.85748    167.0000

+    42.45495    168.0000

+    38.30808    169.0000

+    36.95794    170.0000

+    33.94543    171.0000

+    34.19017    172.0000

+    31.66097    173.0000

+    23.56172    174.0000

+    29.61143    175.0000

+    23.88765    176.0000

+    22.49812    177.0000

+    24.86901    178.0000

+    17.29481    179.0000

+    18.09291    180.0000

+    15.34813    181.0000

+    14.77997    182.0000

+    13.87832    183.0000

+    12.88891    184.0000

+    16.20763    185.0000

+    16.29024    186.0000

+    15.29712    187.0000

+    14.97839    188.0000

+    12.11330    189.0000

+    14.24168    190.0000

+    12.53824    191.0000

+    15.19818    192.0000

+    11.70478    193.0000

+    15.83745    194.0000

+   10.035850    195.0000

+    9.307574    196.0000

+    12.86800    197.0000

+    8.571671    198.0000

+    11.60415    199.0000

+    12.42772    200.0000

+    11.23627    201.0000

+    11.13198    202.0000

+    7.761117    203.0000

+    6.758250    204.0000

+    14.23375    205.0000

+    10.63876    206.0000

+    8.893581    207.0000

+    11.55398    208.0000

+    11.57221    209.0000

+    11.58347    210.0000

+    9.724857    211.0000

+    11.43854    212.0000

+    11.22636    213.0000

+   10.170150    214.0000

+    12.50765    215.0000

+    6.200494    216.0000

+    9.018902    217.0000

+    10.80557    218.0000

+    13.09591    219.0000

+    3.914033    220.0000

+    9.567723    221.0000

+    8.038338    222.0000

+   10.230960    223.0000

+    9.367358    224.0000

+    7.695937    225.0000

+    6.118552    226.0000

+    8.793192    227.0000

+    7.796682    228.0000

+    12.45064    229.0000

+    10.61601    230.0000

+    6.001000    231.0000

+    6.765096    232.0000

+    8.764652    233.0000

+    4.586417    234.0000

+    8.390782    235.0000

+    7.209201    236.0000

+   10.012090    237.0000

+    7.327461    238.0000

+    6.525136    239.0000

+    2.840065    240.0000

+   10.323710    241.0000

+    4.790035    242.0000

+    8.376431    243.0000

+    6.263980    244.0000

+    2.705892    245.0000

+    8.362109    246.0000

+    8.983507    247.0000

+    3.362469    248.0000

+    1.182678    249.0000

+    4.875312    250.0000

diff --git a/data/nist/Hahn1.dat b/data/nist/Hahn1.dat
new file mode 100644
index 0000000..f3069d7
--- /dev/null
+++ b/data/nist/Hahn1.dat
@@ -0,0 +1,296 @@
+NIST/ITL StRD

+Dataset Name:  Hahn1             (Hahn1.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  47)

+               Certified Values  (lines 41 to  52)

+               Data              (lines 61 to 296)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               the thermal expansion of copper.  The response 

+               variable is the coefficient of thermal expansion, and

+               the predictor variable is temperature in degrees 

+               kelvin.

+

+

+Reference:     Hahn, T., NIST (197?). 

+               Copper Thermal Expansion Study.

+

+

+

+

+

+Data:          1 Response  (y = coefficient of thermal expansion)

+               1 Predictor (x = temperature, degrees kelvin)

+               236 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Rational Class (cubic/cubic)

+               7 Parameters (b1 to b7)

+

+               y = (b1+b2*x+b3*x**2+b4*x**3) /

+                   (1+b5*x+b6*x**2+b7*x**3)  +  e

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   10           1            1.0776351733E+00  1.7070154742E-01

+  b2 =   -1          -0.1         -1.2269296921E-01  1.2000289189E-02

+  b3 =    0.05        0.005        4.0863750610E-03  2.2508314937E-04

+  b4 =   -0.00001    -0.000001    -1.4262662514E-06  2.7578037666E-07

+  b5 =   -0.05       -0.005       -5.7609940901E-03  2.4712888219E-04

+  b6 =    0.001       0.0001       2.4053735503E-04  1.0449373768E-05

+  b7 =   -0.000001   -0.0000001   -1.2314450199E-07  1.3027335327E-08

+

+Residual Sum of Squares:                    1.5324382854E+00 

+Residual Standard Deviation:                8.1803852243E-02

+Degrees of Freedom:                               229

+Number of Observations:                           236

+

+

+

+

+

+

+  

+Data:   y              x

+        .591E0         24.41E0  

+       1.547E0         34.82E0  

+       2.902E0         44.09E0  

+       2.894E0         45.07E0  

+       4.703E0         54.98E0  

+       6.307E0         65.51E0  

+       7.03E0          70.53E0  

+       7.898E0         75.70E0  

+       9.470E0         89.57E0  

+       9.484E0         91.14E0  

+      10.072E0         96.40E0  

+      10.163E0         97.19E0  

+      11.615E0        114.26E0  

+      12.005E0        120.25E0  

+      12.478E0        127.08E0  

+      12.982E0        133.55E0  

+      12.970E0        133.61E0  

+      13.926E0        158.67E0  

+      14.452E0        172.74E0  

+      14.404E0        171.31E0  

+      15.190E0        202.14E0  

+      15.550E0        220.55E0  

+      15.528E0        221.05E0  

+      15.499E0        221.39E0  

+      16.131E0        250.99E0  

+      16.438E0        268.99E0  

+      16.387E0        271.80E0  

+      16.549E0        271.97E0  

+      16.872E0        321.31E0  

+      16.830E0        321.69E0  

+      16.926E0        330.14E0  

+      16.907E0        333.03E0  

+      16.966E0        333.47E0  

+      17.060E0        340.77E0  

+      17.122E0        345.65E0  

+      17.311E0        373.11E0  

+      17.355E0        373.79E0  

+      17.668E0        411.82E0  

+      17.767E0        419.51E0  

+      17.803E0        421.59E0  

+      17.765E0        422.02E0  

+      17.768E0        422.47E0  

+      17.736E0        422.61E0  

+      17.858E0        441.75E0  

+      17.877E0        447.41E0  

+      17.912E0        448.7E0   

+      18.046E0        472.89E0  

+      18.085E0        476.69E0  

+      18.291E0        522.47E0  

+      18.357E0        522.62E0  

+      18.426E0        524.43E0  

+      18.584E0        546.75E0  

+      18.610E0        549.53E0  

+      18.870E0        575.29E0  

+      18.795E0        576.00E0  

+      19.111E0        625.55E0  

+        .367E0         20.15E0  

+        .796E0         28.78E0  

+       0.892E0         29.57E0  

+       1.903E0         37.41E0  

+       2.150E0         39.12E0  

+       3.697E0         50.24E0  

+       5.870E0         61.38E0  

+       6.421E0         66.25E0  

+       7.422E0         73.42E0  

+       9.944E0         95.52E0  

+      11.023E0        107.32E0  

+      11.87E0         122.04E0  

+      12.786E0        134.03E0  

+      14.067E0        163.19E0  

+      13.974E0        163.48E0  

+      14.462E0        175.70E0  

+      14.464E0        179.86E0  

+      15.381E0        211.27E0  

+      15.483E0        217.78E0  

+      15.59E0         219.14E0  

+      16.075E0        262.52E0  

+      16.347E0        268.01E0  

+      16.181E0        268.62E0  

+      16.915E0        336.25E0  

+      17.003E0        337.23E0  

+      16.978E0        339.33E0  

+      17.756E0        427.38E0  

+      17.808E0        428.58E0  

+      17.868E0        432.68E0  

+      18.481E0        528.99E0  

+      18.486E0        531.08E0  

+      19.090E0        628.34E0  

+      16.062E0        253.24E0  

+      16.337E0        273.13E0  

+      16.345E0        273.66E0  

+      16.388E0        282.10E0  

+      17.159E0        346.62E0  

+      17.116E0        347.19E0  

+      17.164E0        348.78E0  

+      17.123E0        351.18E0  

+      17.979E0        450.10E0  

+      17.974E0        450.35E0  

+      18.007E0        451.92E0  

+      17.993E0        455.56E0  

+      18.523E0        552.22E0  

+      18.669E0        553.56E0  

+      18.617E0        555.74E0  

+      19.371E0        652.59E0  

+      19.330E0        656.20E0  

+       0.080E0         14.13E0  

+       0.248E0         20.41E0  

+       1.089E0         31.30E0  

+       1.418E0         33.84E0  

+       2.278E0         39.70E0  

+       3.624E0         48.83E0  

+       4.574E0         54.50E0  

+       5.556E0         60.41E0  

+       7.267E0         72.77E0  

+       7.695E0         75.25E0  

+       9.136E0         86.84E0  

+       9.959E0         94.88E0  

+       9.957E0         96.40E0  

+      11.600E0        117.37E0  

+      13.138E0        139.08E0  

+      13.564E0        147.73E0  

+      13.871E0        158.63E0  

+      13.994E0        161.84E0  

+      14.947E0        192.11E0  

+      15.473E0        206.76E0  

+      15.379E0        209.07E0  

+      15.455E0        213.32E0  

+      15.908E0        226.44E0  

+      16.114E0        237.12E0  

+      17.071E0        330.90E0  

+      17.135E0        358.72E0  

+      17.282E0        370.77E0  

+      17.368E0        372.72E0  

+      17.483E0        396.24E0  

+      17.764E0        416.59E0  

+      18.185E0        484.02E0  

+      18.271E0        495.47E0  

+      18.236E0        514.78E0  

+      18.237E0        515.65E0  

+      18.523E0        519.47E0  

+      18.627E0        544.47E0  

+      18.665E0        560.11E0  

+      19.086E0        620.77E0  

+       0.214E0         18.97E0  

+       0.943E0         28.93E0  

+       1.429E0         33.91E0  

+       2.241E0         40.03E0  

+       2.951E0         44.66E0  

+       3.782E0         49.87E0  

+       4.757E0         55.16E0  

+       5.602E0         60.90E0  

+       7.169E0         72.08E0  

+       8.920E0         85.15E0  

+      10.055E0         97.06E0  

+      12.035E0        119.63E0  

+      12.861E0        133.27E0  

+      13.436E0        143.84E0  

+      14.167E0        161.91E0  

+      14.755E0        180.67E0  

+      15.168E0        198.44E0  

+      15.651E0        226.86E0  

+      15.746E0        229.65E0  

+      16.216E0        258.27E0  

+      16.445E0        273.77E0  

+      16.965E0        339.15E0  

+      17.121E0        350.13E0  

+      17.206E0        362.75E0  

+      17.250E0        371.03E0  

+      17.339E0        393.32E0  

+      17.793E0        448.53E0  

+      18.123E0        473.78E0  

+      18.49E0         511.12E0  

+      18.566E0        524.70E0  

+      18.645E0        548.75E0  

+      18.706E0        551.64E0  

+      18.924E0        574.02E0  

+      19.1E0          623.86E0  

+       0.375E0         21.46E0  

+       0.471E0         24.33E0  

+       1.504E0         33.43E0  

+       2.204E0         39.22E0  

+       2.813E0         44.18E0  

+       4.765E0         55.02E0  

+       9.835E0         94.33E0  

+      10.040E0         96.44E0  

+      11.946E0        118.82E0  

+      12.596E0        128.48E0  

+      13.303E0        141.94E0  

+      13.922E0        156.92E0  

+      14.440E0        171.65E0  

+      14.951E0        190.00E0  

+      15.627E0        223.26E0  

+      15.639E0        223.88E0  

+      15.814E0        231.50E0  

+      16.315E0        265.05E0  

+      16.334E0        269.44E0  

+      16.430E0        271.78E0  

+      16.423E0        273.46E0  

+      17.024E0        334.61E0  

+      17.009E0        339.79E0  

+      17.165E0        349.52E0  

+      17.134E0        358.18E0  

+      17.349E0        377.98E0  

+      17.576E0        394.77E0  

+      17.848E0        429.66E0  

+      18.090E0        468.22E0  

+      18.276E0        487.27E0  

+      18.404E0        519.54E0  

+      18.519E0        523.03E0  

+      19.133E0        612.99E0  

+      19.074E0        638.59E0  

+      19.239E0        641.36E0  

+      19.280E0        622.05E0  

+      19.101E0        631.50E0  

+      19.398E0        663.97E0  

+      19.252E0        646.9E0   

+      19.89E0         748.29E0  

+      20.007E0        749.21E0  

+      19.929E0        750.14E0  

+      19.268E0        647.04E0  

+      19.324E0        646.89E0  

+      20.049E0        746.9E0   

+      20.107E0        748.43E0  

+      20.062E0        747.35E0  

+      20.065E0        749.27E0  

+      19.286E0        647.61E0  

+      19.972E0        747.78E0  

+      20.088E0        750.51E0  

+      20.743E0        851.37E0  

+      20.83E0         845.97E0  

+      20.935E0        847.54E0  

+      21.035E0        849.93E0  

+      20.93E0         851.61E0  

+      21.074E0        849.75E0  

+      21.085E0        850.98E0  

+      20.935E0        848.23E0  

diff --git a/data/nist/Kirby2.dat b/data/nist/Kirby2.dat
new file mode 100644
index 0000000..04df176
--- /dev/null
+++ b/data/nist/Kirby2.dat
@@ -0,0 +1,211 @@
+NIST/ITL StRD

+Dataset Name:  Kirby2            (Kirby2.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to  45)

+               Certified Values  (lines 41 to  50)

+               Data              (lines 61 to 211)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               scanning electron microscope line with standards.

+

+

+Reference:     Kirby, R., NIST (197?).  

+               Scanning electron microscope line width standards.

+

+

+

+

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               151 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Rational Class (quadratic/quadratic)

+               5 Parameters (b1 to b5)

+

+               y = (b1 + b2*x + b3*x**2) /

+                   (1 + b4*x + b5*x**2)  +  e

+

+ 

+          Starting values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =    2           1.5          1.6745063063E+00  8.7989634338E-02

+  b2 =   -0.1        -0.15        -1.3927397867E-01  4.1182041386E-03

+  b3 =    0.003       0.0025       2.5961181191E-03  4.1856520458E-05

+  b4 =   -0.001      -0.0015      -1.7241811870E-03  5.8931897355E-05

+  b5 =    0.00001     0.00002      2.1664802578E-05  2.0129761919E-07

+

+Residual Sum of Squares:                    3.9050739624E+00

+Residual Standard Deviation:                1.6354535131E-01

+Degrees of Freedom:                               146

+Number of Observations:                           151

+

+

+

+

+

+

+

+

+

+Data:   y             x

+       0.0082E0      9.65E0

+       0.0112E0     10.74E0

+       0.0149E0     11.81E0

+       0.0198E0     12.88E0

+       0.0248E0     14.06E0

+       0.0324E0     15.28E0

+       0.0420E0     16.63E0

+       0.0549E0     18.19E0

+       0.0719E0     19.88E0

+       0.0963E0     21.84E0

+       0.1291E0     24.00E0

+       0.1710E0     26.25E0

+       0.2314E0     28.86E0

+       0.3227E0     31.85E0

+       0.4809E0     35.79E0

+       0.7084E0     40.18E0

+       1.0220E0     44.74E0

+       1.4580E0     49.53E0

+       1.9520E0     53.94E0

+       2.5410E0     58.29E0

+       3.2230E0     62.63E0

+       3.9990E0     67.03E0

+       4.8520E0     71.25E0

+       5.7320E0     75.22E0

+       6.7270E0     79.33E0

+       7.8350E0     83.56E0

+       9.0250E0     87.75E0

+      10.2670E0     91.93E0

+      11.5780E0     96.10E0

+      12.9440E0    100.28E0

+      14.3770E0    104.46E0

+      15.8560E0    108.66E0

+      17.3310E0    112.71E0

+      18.8850E0    116.88E0

+      20.5750E0    121.33E0

+      22.3200E0    125.79E0

+      22.3030E0    125.79E0

+      23.4600E0    128.74E0

+      24.0600E0    130.27E0

+      25.2720E0    133.33E0

+      25.8530E0    134.79E0

+      27.1100E0    137.93E0

+      27.6580E0    139.33E0

+      28.9240E0    142.46E0

+      29.5110E0    143.90E0

+      30.7100E0    146.91E0

+      31.3500E0    148.51E0

+      32.5200E0    151.41E0

+      33.2300E0    153.17E0

+      34.3300E0    155.97E0

+      35.0600E0    157.76E0

+      36.1700E0    160.56E0

+      36.8400E0    162.30E0

+      38.0100E0    165.21E0

+      38.6700E0    166.90E0

+      39.8700E0    169.92E0

+      40.0300E0    170.32E0

+      40.5000E0    171.54E0

+      41.3700E0    173.79E0

+      41.6700E0    174.57E0

+      42.3100E0    176.25E0

+      42.7300E0    177.34E0

+      43.4600E0    179.19E0

+      44.1400E0    181.02E0

+      44.5500E0    182.08E0

+      45.2200E0    183.88E0

+      45.9200E0    185.75E0

+      46.3000E0    186.80E0

+      47.0000E0    188.63E0

+      47.6800E0    190.45E0

+      48.0600E0    191.48E0

+      48.7400E0    193.35E0

+      49.4100E0    195.22E0

+      49.7600E0    196.23E0

+      50.4300E0    198.05E0

+      51.1100E0    199.97E0

+      51.5000E0    201.06E0

+      52.1200E0    202.83E0

+      52.7600E0    204.69E0

+      53.1800E0    205.86E0

+      53.7800E0    207.58E0

+      54.4600E0    209.50E0

+      54.8300E0    210.65E0

+      55.4000E0    212.33E0

+      56.4300E0    215.43E0

+      57.0300E0    217.16E0

+      58.0000E0    220.21E0

+      58.6100E0    221.98E0

+      59.5800E0    225.06E0

+      60.1100E0    226.79E0

+      61.1000E0    229.92E0

+      61.6500E0    231.69E0

+      62.5900E0    234.77E0

+      63.1200E0    236.60E0

+      64.0300E0    239.63E0

+      64.6200E0    241.50E0

+      65.4900E0    244.48E0

+      66.0300E0    246.40E0

+      66.8900E0    249.35E0

+      67.4200E0    251.32E0

+      68.2300E0    254.22E0

+      68.7700E0    256.24E0

+      69.5900E0    259.11E0

+      70.1100E0    261.18E0

+      70.8600E0    264.02E0

+      71.4300E0    266.13E0

+      72.1600E0    268.94E0

+      72.7000E0    271.09E0

+      73.4000E0    273.87E0

+      73.9300E0    276.08E0

+      74.6000E0    278.83E0

+      75.1600E0    281.08E0

+      75.8200E0    283.81E0

+      76.3400E0    286.11E0

+      76.9800E0    288.81E0

+      77.4800E0    291.08E0

+      78.0800E0    293.75E0

+      78.6000E0    295.99E0

+      79.1700E0    298.64E0

+      79.6200E0    300.84E0

+      79.8800E0    302.02E0

+      80.1900E0    303.48E0

+      80.6600E0    305.65E0

+      81.2200E0    308.27E0

+      81.6600E0    310.41E0

+      82.1600E0    313.01E0

+      82.5900E0    315.12E0

+      83.1400E0    317.71E0

+      83.5000E0    319.79E0

+      84.0000E0    322.36E0

+      84.4000E0    324.42E0

+      84.8900E0    326.98E0

+      85.2600E0    329.01E0

+      85.7400E0    331.56E0

+      86.0700E0    333.56E0

+      86.5400E0    336.10E0

+      86.8900E0    338.08E0

+      87.3200E0    340.60E0

+      87.6500E0    342.57E0

+      88.1000E0    345.08E0

+      88.4300E0    347.02E0

+      88.8300E0    349.52E0

+      89.1200E0    351.44E0

+      89.5400E0    353.93E0

+      89.8500E0    355.83E0

+      90.2500E0    358.32E0

+      90.5500E0    360.20E0

+      90.9300E0    362.67E0

+      91.2000E0    364.53E0

+      91.5500E0    367.00E0

+      92.2000E0    371.30E0

diff --git a/data/nist/Lanczos1.dat b/data/nist/Lanczos1.dat
new file mode 100644
index 0000000..8107320
--- /dev/null
+++ b/data/nist/Lanczos1.dat
@@ -0,0 +1,84 @@
+NIST/ITL StRD

+Dataset Name:  Lanczos1          (Lanczos1.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 46)

+               Certified Values  (lines 41 to 51)

+               Data              (lines 61 to 84)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are taken from an example discussed in

+               Lanczos (1956).  The data were generated to 14-digits

+               of accuracy using

+               f(x) = 0.0951*exp(-x) + 0.8607*exp(-3*x) 

+                                     + 1.5576*exp(-5*x).

+

+

+Reference:     Lanczos, C. (1956).

+               Applied Analysis.

+               Englewood Cliffs, NJ:  Prentice Hall, pp. 272-280.

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               24 Observations

+               Average Level of Difficulty

+               Generated Data

+

+Model:         Exponential Class

+               6 Parameters (b1 to b6)

+

+               y = b1*exp(-b2*x) + b3*exp(-b4*x) + b5*exp(-b6*x)  +  e

+

+

+ 

+          Starting values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   1.2         0.5           9.5100000027E-02  5.3347304234E-11

+  b2 =   0.3         0.7           1.0000000001E+00  2.7473038179E-10

+  b3 =   5.6         3.6           8.6070000013E-01  1.3576062225E-10

+  b4 =   5.5         4.2           3.0000000002E+00  3.3308253069E-10

+  b5 =   6.5         4             1.5575999998E+00  1.8815731448E-10

+  b6 =   7.6         6.3           5.0000000001E+00  1.1057500538E-10

+

+Residual Sum of Squares:                    1.4307867721E-25

+Residual Standard Deviation:                8.9156129349E-14

+Degrees of Freedom:                                18

+Number of Observations:                            24

+

+

+

+

+

+

+

+

+Data:   y                   x

+       2.513400000000E+00  0.000000000000E+00

+       2.044333373291E+00  5.000000000000E-02

+       1.668404436564E+00  1.000000000000E-01

+       1.366418021208E+00  1.500000000000E-01

+       1.123232487372E+00  2.000000000000E-01

+       9.268897180037E-01  2.500000000000E-01

+       7.679338563728E-01  3.000000000000E-01

+       6.388775523106E-01  3.500000000000E-01

+       5.337835317402E-01  4.000000000000E-01

+       4.479363617347E-01  4.500000000000E-01

+       3.775847884350E-01  5.000000000000E-01

+       3.197393199326E-01  5.500000000000E-01

+       2.720130773746E-01  6.000000000000E-01

+       2.324965529032E-01  6.500000000000E-01

+       1.996589546065E-01  7.000000000000E-01

+       1.722704126914E-01  7.500000000000E-01

+       1.493405660168E-01  8.000000000000E-01

+       1.300700206922E-01  8.500000000000E-01

+       1.138119324644E-01  9.000000000000E-01

+       1.000415587559E-01  9.500000000000E-01

+       8.833209084540E-02  1.000000000000E+00

+       7.833544019350E-02  1.050000000000E+00

+       6.976693743449E-02  1.100000000000E+00

+       6.239312536719E-02  1.150000000000E+00

diff --git a/data/nist/Lanczos2.dat b/data/nist/Lanczos2.dat
new file mode 100644
index 0000000..fc98e69
--- /dev/null
+++ b/data/nist/Lanczos2.dat
@@ -0,0 +1,84 @@
+NIST/ITL StRD

+Dataset Name:  Lanczos2          (Lanczos2.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 46)

+               Certified Values  (lines 41 to 51)

+               Data              (lines 61 to 84)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are taken from an example discussed in

+               Lanczos (1956).  The data were generated to 6-digits

+               of accuracy using

+               f(x) = 0.0951*exp(-x) + 0.8607*exp(-3*x) 

+                                     + 1.5576*exp(-5*x).

+

+

+Reference:     Lanczos, C. (1956).

+               Applied Analysis.

+               Englewood Cliffs, NJ:  Prentice Hall, pp. 272-280.

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               24 Observations

+               Average Level of Difficulty

+               Generated Data

+ 

+Model:         Exponential Class

+               6 Parameters (b1 to b6)

+ 

+               y = b1*exp(-b2*x) + b3*exp(-b4*x) + b5*exp(-b6*x)  +  e

+ 

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   1.2         0.5           9.6251029939E-02  6.6770575477E-04

+  b2 =   0.3         0.7           1.0057332849E+00  3.3989646176E-03

+  b3 =   5.6         3.6           8.6424689056E-01  1.7185846685E-03

+  b4 =   5.5         4.2           3.0078283915E+00  4.1707005856E-03

+  b5 =   6.5         4             1.5529016879E+00  2.3744381417E-03

+  b6 =   7.6         6.3           5.0028798100E+00  1.3958787284E-03

+

+Residual Sum of Squares:                    2.2299428125E-11

+Residual Standard Deviation:                1.1130395851E-06

+Degrees of Freedom:                                18

+Number of Observations:                            24

+

+

+

+

+

+

+

+

+Data:   y            x

+       2.51340E+00  0.00000E+00

+       2.04433E+00  5.00000E-02

+       1.66840E+00  1.00000E-01

+       1.36642E+00  1.50000E-01

+       1.12323E+00  2.00000E-01

+       9.26890E-01  2.50000E-01

+       7.67934E-01  3.00000E-01

+       6.38878E-01  3.50000E-01

+       5.33784E-01  4.00000E-01

+       4.47936E-01  4.50000E-01

+       3.77585E-01  5.00000E-01

+       3.19739E-01  5.50000E-01

+       2.72013E-01  6.00000E-01

+       2.32497E-01  6.50000E-01

+       1.99659E-01  7.00000E-01

+       1.72270E-01  7.50000E-01

+       1.49341E-01  8.00000E-01

+       1.30070E-01  8.50000E-01

+       1.13812E-01  9.00000E-01

+       1.00042E-01  9.50000E-01

+       8.83321E-02  1.00000E+00

+       7.83354E-02  1.05000E+00

+       6.97669E-02  1.10000E+00

+       6.23931E-02  1.15000E+00

diff --git a/data/nist/Lanczos3.dat b/data/nist/Lanczos3.dat
new file mode 100644
index 0000000..d930d65
--- /dev/null
+++ b/data/nist/Lanczos3.dat
@@ -0,0 +1,84 @@
+NIST/ITL StRD

+Dataset Name:  Lanczos3          (Lanczos3.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 46)

+               Certified Values  (lines 41 to 51)

+               Data              (lines 61 to 84)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are taken from an example discussed in

+               Lanczos (1956).  The data were generated to 5-digits

+               of accuracy using

+               f(x) = 0.0951*exp(-x) + 0.8607*exp(-3*x) 

+                                     + 1.5576*exp(-5*x).

+

+

+Reference:     Lanczos, C. (1956).

+               Applied Analysis.

+               Englewood Cliffs, NJ:  Prentice Hall, pp. 272-280.

+

+

+

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               24 Observations

+               Lower Level of Difficulty

+               Generated Data

+ 

+Model:         Exponential Class

+               6 Parameters (b1 to b6)

+ 

+               y = b1*exp(-b2*x) + b3*exp(-b4*x) + b5*exp(-b6*x)  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   1.2         0.5           8.6816414977E-02  1.7197908859E-02

+  b2 =   0.3         0.7           9.5498101505E-01  9.7041624475E-02

+  b3 =   5.6         3.6           8.4400777463E-01  4.1488663282E-02

+  b4 =   5.5         4.2           2.9515951832E+00  1.0766312506E-01

+  b5 =   6.5         4             1.5825685901E+00  5.8371576281E-02

+  b6 =   7.6         6.3           4.9863565084E+00  3.4436403035E-02

+

+Residual Sum of Squares:                    1.6117193594E-08

+Residual Standard Deviation:                2.9923229172E-05

+Degrees of Freedom:                                18

+Number of Observations:                            24

+

+

+

+

+

+

+

+

+Data:   y           x

+       2.5134E+00  0.00000E+00

+       2.0443E+00  5.00000E-02

+       1.6684E+00  1.00000E-01

+       1.3664E+00  1.50000E-01

+       1.1232E+00  2.00000E-01

+       0.9269E+00  2.50000E-01

+       0.7679E+00  3.00000E-01

+       0.6389E+00  3.50000E-01

+       0.5338E+00  4.00000E-01

+       0.4479E+00  4.50000E-01

+       0.3776E+00  5.00000E-01

+       0.3197E+00  5.50000E-01

+       0.2720E+00  6.00000E-01

+       0.2325E+00  6.50000E-01

+       0.1997E+00  7.00000E-01

+       0.1723E+00  7.50000E-01

+       0.1493E+00  8.00000E-01

+       0.1301E+00  8.50000E-01

+       0.1138E+00  9.00000E-01

+       0.1000E+00  9.50000E-01

+       0.0883E+00  1.00000E+00

+       0.0783E+00  1.05000E+00

+       0.0698E+00  1.10000E+00

+       0.0624E+00  1.15000E+00

diff --git a/data/nist/MGH09.dat b/data/nist/MGH09.dat
new file mode 100644
index 0000000..1f19af8
--- /dev/null
+++ b/data/nist/MGH09.dat
@@ -0,0 +1,71 @@
+NIST/ITL StRD

+Dataset Name:  MGH09             (MGH09.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 44)

+               Certified Values  (lines 41 to 49)

+               Data              (lines 61 to 71)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   This problem was found to be difficult for some very 

+               good algorithms.  There is a local minimum at (+inf,

+               -14.07..., -inf, -inf) with final sum of squares 

+               0.00102734....

+

+               See More, J. J., Garbow, B. S., and Hillstrom, K. E. 

+               (1981).  Testing unconstrained optimization software.

+               ACM Transactions on Mathematical Software. 7(1): 

+               pp. 17-41.

+

+Reference:     Kowalik, J.S., and M. R. Osborne, (1978).  

+               Methods for Unconstrained Optimization Problems.  

+               New York, NY:  Elsevier North-Holland.

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               11 Observations

+               Higher Level of Difficulty

+               Generated Data

+ 

+Model:         Rational Class (linear/quadratic)

+               4 Parameters (b1 to b4)

+ 

+               y = b1*(x**2+x*b2) / (x**2+x*b3+b4)  +  e

+ 

+

+ 

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   25          0.25          1.9280693458E-01  1.1435312227E-02

+  b2 =   39          0.39          1.9128232873E-01  1.9633220911E-01

+  b3 =   41.5        0.415         1.2305650693E-01  8.0842031232E-02

+  b4 =   39          0.39          1.3606233068E-01  9.0025542308E-02

+

+Residual Sum of Squares:                    3.0750560385E-04

+Residual Standard Deviation:                6.6279236551E-03

+Degrees of Freedom:                                7

+Number of Observations:                           11

+ 

+ 

+

+

+

+

+

+ 

+ 

+ 

+Data:  y               x

+       1.957000E-01    4.000000E+00

+       1.947000E-01    2.000000E+00

+       1.735000E-01    1.000000E+00

+       1.600000E-01    5.000000E-01

+       8.440000E-02    2.500000E-01

+       6.270000E-02    1.670000E-01

+       4.560000E-02    1.250000E-01

+       3.420000E-02    1.000000E-01

+       3.230000E-02    8.330000E-02

+       2.350000E-02    7.140000E-02

+       2.460000E-02    6.250000E-02

diff --git a/data/nist/MGH10.dat b/data/nist/MGH10.dat
new file mode 100644
index 0000000..df88ea4
--- /dev/null
+++ b/data/nist/MGH10.dat
@@ -0,0 +1,76 @@
+NIST/ITL StRD

+Dataset Name:  MGH10             (MGH10.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 43)

+               Certified Values  (lines 41 to 48)

+               Data              (lines 61 to 76)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   This problem was found to be difficult for some very

+               good algorithms.

+

+               See More, J. J., Garbow, B. S., and Hillstrom, K. E. 

+               (1981).  Testing unconstrained optimization software.

+               ACM Transactions on Mathematical Software. 7(1): 

+               pp. 17-41.

+

+Reference:     Meyer, R. R. (1970).  

+               Theoretical and computational aspects of nonlinear 

+               regression.  In Nonlinear Programming, Rosen, 

+               Mangasarian and Ritter (Eds).  

+               New York, NY: Academic Press, pp. 465-486.

+

+Data:          1 Response  (y)

+               1 Predictor (x)

+               16 Observations

+               Higher Level of Difficulty

+               Generated Data

+ 

+Model:         Exponential Class

+               3 Parameters (b1 to b3)

+ 

+               y = b1 * exp[b2/(x+b3)]  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =        2         0.02       5.6096364710E-03  1.5687892471E-04

+  b2 =   400000      4000          6.1813463463E+03  2.3309021107E+01

+  b3 =    25000       250          3.4522363462E+02  7.8486103508E-01

+

+Residual Sum of Squares:                    8.7945855171E+01

+Residual Standard Deviation:                2.6009740065E+00

+Degrees of Freedom:                                13

+Number of Observations:                            16

+

+

+

+

+

+

+

+

+

+

+

+Data:  y               x

+      3.478000E+04    5.000000E+01

+      2.861000E+04    5.500000E+01

+      2.365000E+04    6.000000E+01

+      1.963000E+04    6.500000E+01

+      1.637000E+04    7.000000E+01

+      1.372000E+04    7.500000E+01

+      1.154000E+04    8.000000E+01

+      9.744000E+03    8.500000E+01

+      8.261000E+03    9.000000E+01

+      7.030000E+03    9.500000E+01

+      6.005000E+03    1.000000E+02

+      5.147000E+03    1.050000E+02

+      4.427000E+03    1.100000E+02

+      3.820000E+03    1.150000E+02

+      3.307000E+03    1.200000E+02

+      2.872000E+03    1.250000E+02

diff --git a/data/nist/MGH17.dat b/data/nist/MGH17.dat
new file mode 100644
index 0000000..3b3b7e8
--- /dev/null
+++ b/data/nist/MGH17.dat
@@ -0,0 +1,93 @@
+NIST/ITL StRD

+Dataset Name:  MGH17             (MGH17.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 45)

+               Certified Values  (lines 41 to 50)

+               Data              (lines 61 to 93)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   This problem was found to be difficult for some very

+               good algorithms.

+

+               See More, J. J., Garbow, B. S., and Hillstrom, K. E.

+               (1981).  Testing unconstrained optimization software.

+               ACM Transactions on Mathematical Software. 7(1):

+               pp. 17-41.

+

+Reference:     Osborne, M. R. (1972).  

+               Some aspects of nonlinear least squares 

+               calculations.  In Numerical Methods for Nonlinear 

+               Optimization, Lootsma (Ed).  

+               New York, NY:  Academic Press, pp. 171-189.

+ 

+Data:          1 Response  (y)

+               1 Predictor (x)

+               33 Observations

+               Average Level of Difficulty

+               Generated Data

+

+Model:         Exponential Class

+               5 Parameters (b1 to b5)

+

+               y = b1 + b2*exp[-x*b4] + b3*exp[-x*b5]  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =     50         0.5          3.7541005211E-01  2.0723153551E-03

+  b2 =    150         1.5          1.9358469127E+00  2.2031669222E-01

+  b3 =   -100        -1           -1.4646871366E+00  2.2175707739E-01

+  b4 =      1          0.01        1.2867534640E-02  4.4861358114E-04

+  b5 =      2          0.02        2.2122699662E-02  8.9471996575E-04

+

+Residual Sum of Squares:                    5.4648946975E-05

+Residual Standard Deviation:                1.3970497866E-03

+Degrees of Freedom:                                28

+Number of Observations:                            33

+

+

+

+

+

+

+

+

+

+Data:  y               x

+      8.440000E-01    0.000000E+00

+      9.080000E-01    1.000000E+01

+      9.320000E-01    2.000000E+01

+      9.360000E-01    3.000000E+01

+      9.250000E-01    4.000000E+01

+      9.080000E-01    5.000000E+01

+      8.810000E-01    6.000000E+01

+      8.500000E-01    7.000000E+01

+      8.180000E-01    8.000000E+01

+      7.840000E-01    9.000000E+01

+      7.510000E-01    1.000000E+02

+      7.180000E-01    1.100000E+02

+      6.850000E-01    1.200000E+02

+      6.580000E-01    1.300000E+02

+      6.280000E-01    1.400000E+02

+      6.030000E-01    1.500000E+02

+      5.800000E-01    1.600000E+02

+      5.580000E-01    1.700000E+02

+      5.380000E-01    1.800000E+02

+      5.220000E-01    1.900000E+02

+      5.060000E-01    2.000000E+02

+      4.900000E-01    2.100000E+02

+      4.780000E-01    2.200000E+02

+      4.670000E-01    2.300000E+02

+      4.570000E-01    2.400000E+02

+      4.480000E-01    2.500000E+02

+      4.380000E-01    2.600000E+02

+      4.310000E-01    2.700000E+02

+      4.240000E-01    2.800000E+02

+      4.200000E-01    2.900000E+02

+      4.140000E-01    3.000000E+02

+      4.110000E-01    3.100000E+02

+      4.060000E-01    3.200000E+02

diff --git a/data/nist/Misra1a.dat b/data/nist/Misra1a.dat
new file mode 100644
index 0000000..332f37e
--- /dev/null
+++ b/data/nist/Misra1a.dat
@@ -0,0 +1,74 @@
+NIST/ITL StRD

+Dataset Name:  Misra1a           (Misra1a.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 42)

+               Certified Values  (lines 41 to 47)

+               Data              (lines 61 to 74)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study regarding

+               dental research in monomolecular adsorption.  The

+               response variable is volume, and the predictor

+               variable is pressure.

+

+Reference:     Misra, D., NIST (1978).  

+               Dental Research Monomolecular Adsorption Study.

+

+ 

+

+

+

+

+

+Data:          1 Response Variable  (y = volume)

+               1 Predictor Variable (x = pressure)

+               14 Observations

+               Lower Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               2 Parameters (b1 and b2)

+

+               y = b1*(1-exp[-b2*x])  +  e

+

+

+ 

+          Starting values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   500         250           2.3894212918E+02  2.7070075241E+00

+  b2 =     0.0001      0.0005      5.5015643181E-04  7.2668688436E-06

+

+Residual Sum of Squares:                    1.2455138894E-01

+Residual Standard Deviation:                1.0187876330E-01

+Degrees of Freedom:                                12

+Number of Observations:                            14

+

+

+

+

+

+

+

+

+

+

+

+

+Data:   y               x

+      10.07E0      77.6E0

+      14.73E0     114.9E0

+      17.94E0     141.1E0

+      23.93E0     190.8E0

+      29.61E0     239.9E0

+      35.18E0     289.0E0

+      40.02E0     332.8E0

+      44.82E0     378.4E0

+      50.76E0     434.8E0

+      55.05E0     477.3E0

+      61.01E0     536.8E0

+      66.40E0     593.1E0

+      75.47E0     689.1E0

+      81.78E0     760.0E0

diff --git a/data/nist/Misra1b.dat b/data/nist/Misra1b.dat
new file mode 100644
index 0000000..7923d40
--- /dev/null
+++ b/data/nist/Misra1b.dat
@@ -0,0 +1,74 @@
+NIST/ITL StRD

+Dataset Name:  Misra1b           (Misra1b.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 42)

+               Certified Values  (lines 41 to 47)

+               Data              (lines 61 to 74)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study regarding

+               dental research in monomolecular adsorption.  The

+               response variable is volume, and the predictor

+               variable is pressure.

+

+Reference:     Misra, D., NIST (1978).  

+               Dental Research Monomolecular Adsorption Study.

+

+

+

+

+

+

+

+Data:          1 Response  (y = volume)

+               1 Predictor (x = pressure)

+               14 Observations

+               Lower Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               2 Parameters (b1 and b2)

+

+               y = b1 * (1-(1+b2*x/2)**(-2))  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   500         300           3.3799746163E+02  3.1643950207E+00

+  b2 =     0.0001      0.0002      3.9039091287E-04  4.2547321834E-06

+ 

+Residual Sum of Squares:                    7.5464681533E-02

+Residual Standard Deviation:                7.9301471998E-02

+Degrees of Freedom:                                12

+Number of Observations:                            14

+

+

+

+

+

+

+

+

+

+

+ 

+ 

+Data:   y               x

+      10.07E0      77.6E0

+      14.73E0     114.9E0

+      17.94E0     141.1E0

+      23.93E0     190.8E0

+      29.61E0     239.9E0

+      35.18E0     289.0E0

+      40.02E0     332.8E0

+      44.82E0     378.4E0

+      50.76E0     434.8E0

+      55.05E0     477.3E0

+      61.01E0     536.8E0

+      66.40E0     593.1E0

+      75.47E0     689.1E0

+      81.78E0     760.0E0

diff --git a/data/nist/Misra1c.dat b/data/nist/Misra1c.dat
new file mode 100644
index 0000000..d86bc82
--- /dev/null
+++ b/data/nist/Misra1c.dat
@@ -0,0 +1,74 @@
+NIST/ITL StRD

+Dataset Name:  Misra1c           (Misra1c.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 42)

+               Certified Values  (lines 41 to 47)

+               Data              (lines 61 to 74)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study regarding

+               dental research in monomolecular adsorption.  The

+               response variable is volume, and the predictor

+               variable is pressure.

+

+Reference:     Misra, D., NIST (1978).  

+               Dental Research Monomolecular Adsorption.

+

+

+

+

+

+

+

+Data:          1 Response  (y = volume)

+               1 Predictor (x = pressure)

+               14 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               2 Parameters (b1 and b2)

+

+               y = b1 * (1-(1+2*b2*x)**(-.5))  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   500         600           6.3642725809E+02  4.6638326572E+00

+  b2 =     0.0001      0.0002      2.0813627256E-04  1.7728423155E-06

+  

+Residual Sum of Squares:                    4.0966836971E-02

+Residual Standard Deviation:                5.8428615257E-02

+Degrees of Freedom:                                12

+Number of Observations:                            14

+ 

+

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+  

+  

+  

+Data:   y            x 

+      10.07E0      77.6E0

+      14.73E0     114.9E0

+      17.94E0     141.1E0

+      23.93E0     190.8E0

+      29.61E0     239.9E0

+      35.18E0     289.0E0

+      40.02E0     332.8E0

+      44.82E0     378.4E0

+      50.76E0     434.8E0

+      55.05E0     477.3E0

+      61.01E0     536.8E0

+      66.40E0     593.1E0

+      75.47E0     689.1E0

+      81.78E0     760.0E0

diff --git a/data/nist/Misra1d.dat b/data/nist/Misra1d.dat
new file mode 100644
index 0000000..237de46
--- /dev/null
+++ b/data/nist/Misra1d.dat
@@ -0,0 +1,74 @@
+NIST/ITL StRD

+Dataset Name:  Misra1d           (Misra1d.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 42)

+               Certified Values  (lines 41 to 47)

+               Data              (lines 61 to 74)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study regarding

+               dental research in monomolecular adsorption.  The

+               response variable is volume, and the predictor

+               variable is pressure.

+

+Reference:     Misra, D., NIST (1978).  

+               Dental Research Monomolecular Adsorption Study.

+

+

+

+

+

+

+

+Data:          1 Response  (y = volume)

+               1 Predictor (x = pressure)

+               14 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               2 Parameters (b1 and b2)

+

+               y = b1*b2*x*((1+b2*x)**(-1))  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   500         450           4.3736970754E+02  3.6489174345E+00

+  b2 =     0.0001      0.0003      3.0227324449E-04  2.9334354479E-06

+

+Residual Sum of Squares:                    5.6419295283E-02

+Residual Standard Deviation:                6.8568272111E-02

+Degrees of Freedom:                                12

+Number of Observations:                            14

+

+

+

+

+

+

+

+

+

+

+

+

+Data:   y            x

+      10.07E0      77.6E0

+      14.73E0     114.9E0

+      17.94E0     141.1E0

+      23.93E0     190.8E0

+      29.61E0     239.9E0

+      35.18E0     289.0E0

+      40.02E0     332.8E0

+      44.82E0     378.4E0

+      50.76E0     434.8E0

+      55.05E0     477.3E0

+      61.01E0     536.8E0

+      66.40E0     593.1E0

+      75.47E0     689.1E0

+      81.78E0     760.0E0

diff --git a/data/nist/Nelson.dat b/data/nist/Nelson.dat
new file mode 100644
index 0000000..5ce1003
--- /dev/null
+++ b/data/nist/Nelson.dat
@@ -0,0 +1,188 @@
+NIST/ITL StRD

+Dataset Name:  Nelson            (Nelson.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 43)

+               Certified Values  (lines 41 to 48)

+               Data              (lines 61 to 188)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a study involving

+               the analysis of performance degradation data from

+               accelerated tests, published in IEEE Transactions

+               on Reliability.  The response variable is dialectric

+               breakdown strength in kilo-volts, and the predictor

+               variables are time in weeks and temperature in degrees

+               Celcius.

+

+

+Reference:     Nelson, W. (1981).  

+               Analysis of Performance-Degradation Data.  

+               IEEE Transactions on Reliability.

+               Vol. 2, R-30, No. 2, pp. 149-155.

+

+Data:          1 Response   ( y = dialectric breakdown strength) 

+               2 Predictors (x1 = time; x2 = temperature)

+               128 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               3 Parameters (b1 to b3)

+

+               log[y] = b1 - b2*x1 * exp[-b3*x2]  +  e

+

+

+

+          Starting values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =    2           2.5          2.5906836021E+00  1.9149996413E-02

+  b2 =    0.0001      0.000000005  5.6177717026E-09  6.1124096540E-09

+  b3 =   -0.01       -0.05        -5.7701013174E-02  3.9572366543E-03

+

+Residual Sum of Squares:                    3.7976833176E+00

+Residual Standard Deviation:                1.7430280130E-01

+Degrees of Freedom:                               125

+Number of Observations:                           128

+

+

+

+

+

+

+

+

+

+

+

+Data:   y              x1            x2

+      15.00E0         1E0         180E0

+      17.00E0         1E0         180E0

+      15.50E0         1E0         180E0

+      16.50E0         1E0         180E0

+      15.50E0         1E0         225E0

+      15.00E0         1E0         225E0

+      16.00E0         1E0         225E0

+      14.50E0         1E0         225E0

+      15.00E0         1E0         250E0

+      14.50E0         1E0         250E0

+      12.50E0         1E0         250E0

+      11.00E0         1E0         250E0

+      14.00E0         1E0         275E0

+      13.00E0         1E0         275E0

+      14.00E0         1E0         275E0

+      11.50E0         1E0         275E0

+      14.00E0         2E0         180E0

+      16.00E0         2E0         180E0

+      13.00E0         2E0         180E0

+      13.50E0         2E0         180E0

+      13.00E0         2E0         225E0

+      13.50E0         2E0         225E0

+      12.50E0         2E0         225E0

+      12.50E0         2E0         225E0

+      12.50E0         2E0         250E0

+      12.00E0         2E0         250E0

+      11.50E0         2E0         250E0

+      12.00E0         2E0         250E0

+      13.00E0         2E0         275E0

+      11.50E0         2E0         275E0

+      13.00E0         2E0         275E0

+      12.50E0         2E0         275E0

+      13.50E0         4E0         180E0

+      17.50E0         4E0         180E0

+      17.50E0         4E0         180E0

+      13.50E0         4E0         180E0

+      12.50E0         4E0         225E0

+      12.50E0         4E0         225E0

+      15.00E0         4E0         225E0

+      13.00E0         4E0         225E0

+      12.00E0         4E0         250E0

+      13.00E0         4E0         250E0

+      12.00E0         4E0         250E0

+      13.50E0         4E0         250E0

+      10.00E0         4E0         275E0

+      11.50E0         4E0         275E0

+      11.00E0         4E0         275E0

+       9.50E0         4E0         275E0

+      15.00E0         8E0         180E0

+      15.00E0         8E0         180E0

+      15.50E0         8E0         180E0

+      16.00E0         8E0         180E0

+      13.00E0         8E0         225E0

+      10.50E0         8E0         225E0

+      13.50E0         8E0         225E0

+      14.00E0         8E0         225E0

+      12.50E0         8E0         250E0

+      12.00E0         8E0         250E0

+      11.50E0         8E0         250E0

+      11.50E0         8E0         250E0

+       6.50E0         8E0         275E0

+       5.50E0         8E0         275E0

+       6.00E0         8E0         275E0

+       6.00E0         8E0         275E0

+      18.50E0        16E0         180E0

+      17.00E0        16E0         180E0

+      15.30E0        16E0         180E0

+      16.00E0        16E0         180E0

+      13.00E0        16E0         225E0

+      14.00E0        16E0         225E0

+      12.50E0        16E0         225E0

+      11.00E0        16E0         225E0

+      12.00E0        16E0         250E0

+      12.00E0        16E0         250E0

+      11.50E0        16E0         250E0

+      12.00E0        16E0         250E0

+       6.00E0        16E0         275E0

+       6.00E0        16E0         275E0

+       5.00E0        16E0         275E0

+       5.50E0        16E0         275E0

+      12.50E0        32E0         180E0

+      13.00E0        32E0         180E0

+      16.00E0        32E0         180E0

+      12.00E0        32E0         180E0

+      11.00E0        32E0         225E0

+       9.50E0        32E0         225E0

+      11.00E0        32E0         225E0

+      11.00E0        32E0         225E0

+      11.00E0        32E0         250E0

+      10.00E0        32E0         250E0

+      10.50E0        32E0         250E0

+      10.50E0        32E0         250E0

+       2.70E0        32E0         275E0

+       2.70E0        32E0         275E0

+       2.50E0        32E0         275E0

+       2.40E0        32E0         275E0

+      13.00E0        48E0         180E0

+      13.50E0        48E0         180E0

+      16.50E0        48E0         180E0

+      13.60E0        48E0         180E0

+      11.50E0        48E0         225E0

+      10.50E0        48E0         225E0

+      13.50E0        48E0         225E0

+      12.00E0        48E0         225E0

+       7.00E0        48E0         250E0

+       6.90E0        48E0         250E0

+       8.80E0        48E0         250E0

+       7.90E0        48E0         250E0

+       1.20E0        48E0         275E0

+       1.50E0        48E0         275E0

+       1.00E0        48E0         275E0

+       1.50E0        48E0         275E0

+      13.00E0        64E0         180E0

+      12.50E0        64E0         180E0

+      16.50E0        64E0         180E0

+      16.00E0        64E0         180E0

+      11.00E0        64E0         225E0

+      11.50E0        64E0         225E0

+      10.50E0        64E0         225E0

+      10.00E0        64E0         225E0

+       7.27E0        64E0         250E0

+       7.50E0        64E0         250E0

+       6.70E0        64E0         250E0

+       7.60E0        64E0         250E0

+       1.50E0        64E0         275E0

+       1.00E0        64E0         275E0

+       1.20E0        64E0         275E0

+       1.20E0        64E0         275E0

diff --git a/data/nist/Rat42.dat b/data/nist/Rat42.dat
new file mode 100644
index 0000000..e112fbb
--- /dev/null
+++ b/data/nist/Rat42.dat
@@ -0,0 +1,69 @@
+NIST/ITL StRD

+Dataset Name:  Rat42             (Rat42.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 43)

+               Certified Values  (lines 41 to 48)

+               Data              (lines 61 to 69)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   This model and data are an example of fitting

+               sigmoidal growth curves taken from Ratkowsky (1983).

+               The response variable is pasture yield, and the

+               predictor variable is growing time.

+

+

+Reference:     Ratkowsky, D.A. (1983).  

+               Nonlinear Regression Modeling.

+               New York, NY:  Marcel Dekker, pp. 61 and 88.

+

+

+

+

+

+Data:          1 Response  (y = pasture yield)

+               1 Predictor (x = growing time)

+               9 Observations

+               Higher Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               3 Parameters (b1 to b3)

+

+               y = b1 / (1+exp[b2-b3*x])  +  e

+

+

+

+          Starting Values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   100         75            7.2462237576E+01  1.7340283401E+00

+  b2 =     1          2.5          2.6180768402E+00  8.8295217536E-02

+  b3 =     0.1        0.07         6.7359200066E-02  3.4465663377E-03

+

+Residual Sum of Squares:                    8.0565229338E+00

+Residual Standard Deviation:                1.1587725499E+00

+Degrees of Freedom:                                6

+Number of Observations:                            9 

+

+

+

+

+

+

+

+

+

+

+

+Data:   y              x

+       8.930E0        9.000E0

+      10.800E0       14.000E0

+      18.590E0       21.000E0

+      22.330E0       28.000E0

+      39.350E0       42.000E0

+      56.110E0       57.000E0

+      61.730E0       63.000E0

+      64.620E0       70.000E0

+      67.080E0       79.000E0

diff --git a/data/nist/Rat43.dat b/data/nist/Rat43.dat
new file mode 100644
index 0000000..347d846
--- /dev/null
+++ b/data/nist/Rat43.dat
@@ -0,0 +1,75 @@
+NIST/ITL StRD

+Dataset Name:  Rat43             (Rat43.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 44)

+               Certified Values  (lines 41 to 49)

+               Data              (lines 61 to 75)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   This model and data are an example of fitting  

+               sigmoidal growth curves taken from Ratkowsky (1983).  

+               The response variable is the dry weight of onion bulbs 

+               and tops, and the predictor variable is growing time. 

+

+

+Reference:     Ratkowsky, D.A. (1983).  

+               Nonlinear Regression Modeling.

+               New York, NY:  Marcel Dekker, pp. 62 and 88.

+

+

+

+

+

+Data:          1 Response  (y = onion bulb dry weight)

+               1 Predictor (x = growing time)

+               15 Observations

+               Higher Level of Difficulty

+               Observed Data

+

+Model:         Exponential Class

+               4 Parameters (b1 to b4)

+

+               y = b1 / ((1+exp[b2-b3*x])**(1/b4))  +  e

+

+

+

+          Starting Values                  Certified Values

+ 

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   100         700           6.9964151270E+02  1.6302297817E+01

+  b2 =    10           5           5.2771253025E+00  2.0828735829E+00

+  b3 =     1           0.75        7.5962938329E-01  1.9566123451E-01

+  b4 =     1           1.3         1.2792483859E+00  6.8761936385E-01

+ 

+Residual Sum of Squares:                    8.7864049080E+03

+Residual Standard Deviation:                2.8262414662E+01

+Degrees of Freedom:                                9

+Number of Observations:                           15 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+ 

+Data:   y          x

+      16.08E0     1.0E0

+      33.83E0     2.0E0

+      65.80E0     3.0E0

+      97.20E0     4.0E0

+     191.55E0     5.0E0

+     326.20E0     6.0E0

+     386.87E0     7.0E0

+     520.53E0     8.0E0

+     590.03E0     9.0E0

+     651.92E0    10.0E0

+     724.93E0    11.0E0

+     699.56E0    12.0E0

+     689.96E0    13.0E0

+     637.56E0    14.0E0

+     717.41E0    15.0E0

diff --git a/data/nist/Roszman1.dat b/data/nist/Roszman1.dat
new file mode 100644
index 0000000..0296837
--- /dev/null
+++ b/data/nist/Roszman1.dat
@@ -0,0 +1,85 @@
+NIST/ITL StRD

+Dataset Name:  Roszman1          (Roszman1.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 44)

+               Certified Values  (lines 41 to 49)

+               Data              (lines 61 to 85)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               quantum defects in iodine atoms.  The response

+               variable is the number of quantum defects, and the

+               predictor variable is the excited energy state.

+               The argument to the ARCTAN function is in radians.

+

+Reference:     Roszman, L., NIST (19??).  

+               Quantum Defects for Sulfur I Atom.

+

+

+

+

+

+

+Data:          1 Response  (y = quantum defect)

+               1 Predictor (x = excited state energy)

+               25 Observations

+               Average Level of Difficulty

+               Observed Data

+

+Model:         Miscellaneous Class

+               4 Parameters (b1 to b4)

+

+               pi = 3.141592653589793238462643383279E0

+               y =  b1 - b2*x - arctan[b3/(x-b4)]/pi  +  e

+

+

+          Starting Values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =      0.1         0.2         2.0196866396E-01  1.9172666023E-02

+  b2 =     -0.00001    -0.000005   -6.1953516256E-06  3.2058931691E-06

+  b3 =   1000        1200           1.2044556708E+03  7.4050983057E+01

+  b4 =   -100        -150          -1.8134269537E+02  4.9573513849E+01

+

+Residual Sum of Squares:                    4.9484847331E-04

+Residual Standard Deviation:                4.8542984060E-03

+Degrees of Freedom:                                 21

+Number of Observations:                             25

+

+

+

+

+

+

+

+

+

+

+Data:   y           x

+       0.252429    -4868.68

+       0.252141    -4868.09

+       0.251809    -4867.41

+       0.297989    -3375.19

+       0.296257    -3373.14

+       0.295319    -3372.03

+       0.339603    -2473.74

+       0.337731    -2472.35

+       0.333820    -2469.45

+       0.389510    -1894.65

+       0.386998    -1893.40

+       0.438864    -1497.24

+       0.434887    -1495.85

+       0.427893    -1493.41

+       0.471568    -1208.68

+       0.461699    -1206.18

+       0.461144    -1206.04

+       0.513532     -997.92

+       0.506641     -996.61

+       0.505062     -996.31

+       0.535648     -834.94

+       0.533726     -834.66

+       0.568064     -710.03

+       0.612886     -530.16

+       0.624169     -464.17

diff --git a/data/nist/Thurber.dat b/data/nist/Thurber.dat
new file mode 100644
index 0000000..6d72fd9
--- /dev/null
+++ b/data/nist/Thurber.dat
@@ -0,0 +1,97 @@
+NIST/ITL StRD

+Dataset Name:  Thurber           (Thurber.dat)

+

+File Format:   ASCII

+               Starting Values   (lines 41 to 47)

+               Certified Values  (lines 41 to 52)

+               Data              (lines 61 to 97)

+

+Procedure:     Nonlinear Least Squares Regression

+

+Description:   These data are the result of a NIST study involving

+               semiconductor electron mobility.  The response 

+               variable is a measure of electron mobility, and the 

+               predictor variable is the natural log of the density.

+

+

+Reference:     Thurber, R., NIST (197?).  

+               Semiconductor electron mobility modeling.

+

+

+

+

+

+

+Data:          1 Response Variable  (y = electron mobility)

+               1 Predictor Variable (x = log[density])

+               37 Observations

+               Higher Level of Difficulty

+               Observed Data

+

+Model:         Rational Class (cubic/cubic)

+               7 Parameters (b1 to b7)

+

+               y = (b1 + b2*x + b3*x**2 + b4*x**3) / 

+                   (1 + b5*x + b6*x**2 + b7*x**3)  +  e

+

+

+          Starting Values                  Certified Values

+

+        Start 1     Start 2           Parameter     Standard Deviation

+  b1 =   1000        1300          1.2881396800E+03  4.6647963344E+00

+  b2 =   1000        1500          1.4910792535E+03  3.9571156086E+01

+  b3 =    400         500          5.8323836877E+02  2.8698696102E+01

+  b4 =     40          75          7.5416644291E+01  5.5675370270E+00

+  b5 =      0.7         1          9.6629502864E-01  3.1333340687E-02

+  b6 =      0.3         0.4        3.9797285797E-01  1.4984928198E-02

+  b7 =      0.03        0.05       4.9727297349E-02  6.5842344623E-03

+

+Residual Sum of Squares:                    5.6427082397E+03

+Residual Standard Deviation:                1.3714600784E+01

+Degrees of Freedom:                                30

+Number of Observations:                            37

+

+

+

+

+

+

+

+Data:   y             x

+      80.574E0      -3.067E0

+      84.248E0      -2.981E0

+      87.264E0      -2.921E0

+      87.195E0      -2.912E0

+      89.076E0      -2.840E0

+      89.608E0      -2.797E0

+      89.868E0      -2.702E0

+      90.101E0      -2.699E0

+      92.405E0      -2.633E0

+      95.854E0      -2.481E0

+     100.696E0      -2.363E0

+     101.060E0      -2.322E0

+     401.672E0      -1.501E0

+     390.724E0      -1.460E0

+     567.534E0      -1.274E0

+     635.316E0      -1.212E0

+     733.054E0      -1.100E0

+     759.087E0      -1.046E0

+     894.206E0      -0.915E0

+     990.785E0      -0.714E0

+    1090.109E0      -0.566E0

+    1080.914E0      -0.545E0

+    1122.643E0      -0.400E0

+    1178.351E0      -0.309E0

+    1260.531E0      -0.109E0

+    1273.514E0      -0.103E0

+    1288.339E0       0.010E0

+    1327.543E0       0.119E0

+    1353.863E0       0.377E0

+    1414.509E0       0.790E0

+    1425.208E0       0.963E0

+    1421.384E0       1.006E0

+    1442.962E0       1.115E0

+    1464.350E0       1.572E0

+    1468.705E0       1.841E0

+    1447.894E0       2.047E0

+    1457.628E0       2.200E0