Re: [Matplotlib-users] Plot only inside a disc

> -----Original Message-----
> From: John Hunter [mailto:jd...@gm...]
>
> On Fri, Jan 30, 2009 at 8:54 AM,  <And...@gt...> wrote:
>
> > This is a very timely question for me.  I'm needing to do something
> very similar, but I need to overlay a semi-transparent rectangle with a
> hole cut out of it.  So, I'm making a rectangular patch, making a
> circular patch, setting the circular patch as the clip region for the
> rectangular patch, and then adding the clipped patch to the plot.
> However, I seem to be having trouble with the coordinate system, as
> there is no clipping on the rectangle.
> >
> > My test code looks like this:
>
> > r.set_clip_path(cutout)
> > ax.add_patch(r)
> > plt.show()
>
>
> The problem is that the "add_patch" command is setting the clippath to
> the axes bounding box.  I just committed a patch on the branch and
> trunk which only sets the clippath to the default if it is not already
> set.  If you don't have access to svn, just make the call to
> r.set_clip_path *after* you call ax.add_patch.
>
> JDH

Hmm ... this doesn't quite give me what I'm looking for.  When I do that, I get a semitransparent circle that is clipped to a rectangle.  What I need is a semi-transparent rectangle (with a hole cut out of the middle) that overlays the plot.  The attached graphic demonstrates the concept.

Thanks for the response.