[Matplotlib-users] Clipping Contours

[T J <tj...@gm...>]

I'm interested in clipping the result of plt.contour (and
plt.contourf) to a patch.  However, QuadContourSet does not have a
set_clip_path() method.  Is there a way to do this?

Here is an example plot that I have generated.

   http://imgur.com/pybIf

For the curious, it plots contours of a function on the 2-simplex.
The way I've gone about computing this is, unfortunately, convoluted.
I generate a regular grid in 2D and treat each point as a projection
of a 3D probability vector into 2D.  Then, I invert the projection so
that I have "distributions" and then compute the Z value for each
point.  The contours are then calculated, but now, I need to clip
everything outside the triangle, as only points within the triangle
correspond to actual distributions.

Is there a more direct way to calculate contours on a restricted set?

Thanks.