From: Damon McDougall <D.McD<ougall@wa...>  20120416 14:56:06

Hi, I have two arrays of coordinates in the xy plane, z_1 and z_2. The array z_1 encloses a closed, convex and simply connected region (not a circle). The array z_2 encloses another object that is also closed, convex and simply connected. The region enclosed by z_2 is contained entirely within the region described by z_1. The picture in your head should be of one blob inside another. I want to use Axes.fill_between() to fill the 'annulus' region. This is the region containing points that are enclosed by z_1, but not by z_2. Is this possible? I've tried fiddling with the 'where' kwarg to no avail. Since they are not circles, I figured this is a nogo with the current matplotlib Axes.* functions. Is my best bet to build a PolyCollection or a matplotlib.patch and add it to the axes myself? Any help is greatly appreciated. Thank you.  Damon McDougall d.mcdougall@... (mailto:d.mcdougall@...) http://damon.isageek.com B2.39 Mathematics Institute University of Warwick Coventry West Midlands CV4 7AL United Kingdom 