tree 0535b8cde25d90a50f93017b4511e4e114b6f6ca
parent bdabc29d9096ba79954b005d71d8c86ccc9feee8
author Sameer Agarwal <sameeragarwal@google.com> 1352340894 -0800
committer Sameer Agarwal <sameeragarwal@google.com> 1352400018 -0800

Add the GradientChecker.

The GradientChecker is a utility class written by
William Rucklidge that can be used to check that the
derivatives returned by a cost function match those
returned by numerically differentiating the residuals
returned by the same cost function.

This is useful when developing CostFunction objects
and testing them before plugging them into an optimization
problem.

Change-Id: Ic60f859b48b6246406448555d25556784e097b81