matplotlib/matplotlib — pull request #1010 by dmcdougall (2012-07-14 11:21:31+00:00)
Title: Port part of errorfill from Tony Yu's mpltools.

Specifically, the function `extrema_from_error_input` from

https://github.com/tonysyu/mpltools/blob/master/mpltools/special/errorfill.py#L54

is ported to matplotlib.mlab.