[matplotlib-devel] fix for "errorbar" method skipping over plot color cycle

[Erik T. <eri...@gm...>]

I noticed while making some plots with upper bound error bars that
whenever Axes.errorbars is called with any of the errorbars chosen as
upper or lower bounds, that the color cycle was off, skipping over 2
colors each time another errorbar plot was made (e.g. the first would
be green and the second would be cyan instead of blue,green,red,cyan).
Looking into the axes class, it appears that if you don't specify a
color and want the markers to be drawn over the errorbars, the color
cycle has already been skipped over one because of calls to draw the
markers into the plot.  The solution is to change all the lines that
say " ls='None' " in the errorbar method to instead say " ls='k' " -
this will prevent those calls from cycling the colors, and hence only
the call to actually draw the markers will do so.  Can this patch be
committed to svn?