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 <[email protected]> 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 > _______________________________________________ > scikit-learn mailing list > [email protected] > https://mail.python.org/mailman/listinfo/scikit-learn >
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