scipy/scipy — pull request #317 by dlax (2012-09-16 20:18:57+00:00)
Title: ENH: add a callback mechanism to L-BFGS-B (ticket #923)

As suggested in [ticket #923](http://projects.scipy.org/scipy/ticket/923), this PR adds a callback mechanism to L-BFGS-B minimization algorithm. It is not the same as suggested in the ticket but it conforms with other callback behavior in the optimize module.