tree 22b06b2b6f406c6ad308c631f7bf9fe94f0b92d4
parent 2a5599f37888d37c588badbf9f5e08d097fcf830
author Sameer Agarwal <sameeragarwal@google.com> 1401928143 -0700
committer Keir Mierle <mierle@gmail.com> 1401995369 +0000

Change logging for TRUST_REGION.

The current logging for trust region minimizer is very informative
but cryptic. Single or double letter abbreviations must be deciphered
to make sense of it.

Here is an alternate take on it.

Before:

   0: f: 4.185660e+06 d: 0.00e+00 g: 2.16e+07 h: 0.00e+00 rho: 0.00e+00 mu: 1.00e+04 li:  0 it: 7.36e-02 tt: 3.47e-01
   1: f: 1.980525e+05 d: 3.99e+06 g: 5.34e+06 h: 2.40e+03 rho: 9.60e-01 mu: 3.00e+04 li:  1 it: 1.80e-01 tt: 5.27e-01
   2: f: 5.086543e+04 d: 1.47e+05 g: 2.11e+06 h: 1.01e+03 rho: 8.22e-01 mu: 4.09e+04 li:  1 it: 1.57e-01 tt: 6.84e-01
   3: f: 1.859667e+04 d: 3.23e+04 g: 2.87e+05 h: 2.64e+02 rho: 9.85e-01 mu: 1.23e+05 li:  1 it: 1.50e-01 tt: 8.34e-01
   4: f: 1.803857e+04 d: 5.58e+02 g: 2.69e+04 h: 8.66e+01 rho: 9.93e-01 mu: 3.69e+05 li:  1 it: 1.47e-01 tt: 9.82e-01
   5: f: 1.803391e+04 d: 4.66e+00 g: 3.11e+02 h: 1.02e+01 rho: 1.00e+00 mu: 1.11e+06 li:  1 it: 1.51e-01 tt: 1.13e+00

After:

iter      cost      cost_change  |gradient|   |step|    tr_ratio  tr_radius  ls_iter  iter_time  total_time
   0  4.185660e+06    0.00e+00    2.16e+07   0.00e+00   0.00e+00  1.00e+04       0    7.16e-02    3.27e-01
   1  1.980525e+05    3.99e+06    5.34e+06   2.40e+03   9.60e-01  3.00e+04       1    1.77e-01    5.04e-01
   2  5.086543e+04    1.47e+05    2.11e+06   1.01e+03   8.22e-01  4.09e+04       1    1.49e-01    6.54e-01
   3  1.859667e+04    3.23e+04    2.87e+05   2.64e+02   9.85e-01  1.23e+05       1    1.45e-01    7.99e-01
   4  1.803857e+04    5.58e+02    2.69e+04   8.66e+01   9.93e-01  3.69e+05       1    1.46e-01    9.45e-01
   5  1.803391e+04    4.66e+00    3.11e+02   1.02e+01   1.00e+00  1.11e+06       1    1.48e-01    1.09e+00

Change-Id: I251f99d474028e07cb709965d513809c443884b6