matplotlib/matplotlib — pull request #701 by jswhit (2012-02-10 18:03:05+00:00)
Title: modify pcolor so masked elements are plotted with color specifed in cmap.set_bad

Previously all masked values in X,Y and C were simply not plotted at all. This patch plots the masked values in C (so that those polygons are colored with the color specified by cmap.set_bad), but still skips the masked values in X and Y.