scikit-learn/scikit-learn — pull request #457 by fabianp (2011-12-08 14:12:49+00:00)
Title: Make locally_linear_embedding robust to zero eigenvalues.

arpack in shift-invert mode raises an Exception with zero eigenvalues,
so degrade gratefully to the non shirt-invert mode for those cases.

Issue reported by Timmy Wilson in the mailing list:

http://permalink.gmane.org/gmane.comp.python.scikit-learn/1123