tree 99b16d8ae252e64182f18943562ed351c0681863
parent 0f6161ba60ce296781eeb23bde0f42c0ed7570ee
author Sameer Agarwal <sameeragarwal@google.com> 1370226929 -0700
committer Sameer Agarwal <sameeragarwal@google.com> 1370241387 -0700

Pay attention to condition number in covariance estimation.

1. Sparse covariance estimation now uses cholmod_rcond to
detect singular Jacobians.

2. Dense covariance estimation now uses relative magnitude
of singular/eigen values to compute the pseudoinverse.

3. Truncation logic is now unified with Solver::Options::null_space_rank.

Change-Id: I095bd737510c836b4251255926190a7f31d64bce