Hi, 

I have two arrays of coordinates in the x-y 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 no-go 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.mcdoug...@warwick.ac.uk (mailto:d.mcdoug...@warwick.ac.uk)
http://damon.is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom


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