[scikit-learn] Problems with plotting decision regions

[Jacob Vanderplas]

It seems to work correctly if you replace the colormap with a continuous
one like 'viridis'. I suspect this is a bug in matplotlib's ListedColormap,
   Jake

 Jake VanderPlas
 Senior Data Science Fellow
 Director of Research in Physical Sciences
 University of Washington eScience Institute

On Tue, Sep 13, 2016 at 7:47 AM, Sebastian Raschka <se.raschka at gmail.com>
wrote:

> Hi, all,
> I am having some problems with showing decision regions in 2D if more than
> 4 classes are present. Really can’t figure out the source of the problem
> and would really appreciate some help if you have done this before or have
> any pointer since I am afraid that I am overlooking something really simple
> here.
>
> I created a gist of 2 simple examples with images attached:
>
> https://gist.github.com/rasbt/6fb65bba38b70e28e60a9842b988cc67
>
> I think it is very likely that it is not a bug in scikit-learn but rather
> a matplotlib contourf bug? In case it is a bug at all …
>
> Best,
> Sebastian
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