Re: [Matplotlib-users] Varying alpha in ListedColormap not working

[Paul I. <piv...@gm...>]

On Wed, Dec 5, 2012 at 2:36 PM, Oliver King <oli...@gm...> wrote:
> What appears to be happening is that the alpha values in the cmap I use when I create the ListedColormap object are being ignored by the add_collection function. I see that this bug (or something quite like it) was reported in late 2008:
> http://matplotlib.1069221.n5.nabble.com/create-ListedColormap-with-different-alpha-values-tt18693.html#a18697
>
> Did the patch from late 2008 not make it into the code, or has this bug resurfaced? Does anyone know of a workaround for this issue?

It's all a blur now, but I don't think that patch made it in because
colormaps were inherently RGB not RGBA.

Something similar to that patch was merged in a year ago:
https://github.com/matplotlib/matplotlib/pull/660 and attached is the
result of running your code on my machine.

What is your matplotlib.__version__ ? I think that code only made it's
way into v1.2.0 (the latest stable), and was did not make it into
v1.1.1 (or anything before it)

--
Paul Ivanov
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