Re: [Matplotlib-users] [matplotlib-devel] RFC: candidates for a new default colormap

On 2015/06/05 8:17 AM, Sourish Basu wrote:
> Very often the "zero" of an anomaly is not at the center of the extrema,
> and requires creating a custom diverging colormap anyway (see attached
> example).

Reminder: in matplotlib, color mapping is done with the combination of a 
colormap and a norm.  This allows one to design a norm to handle the 
mapping, including any nonlinearity or difference between the handling 
of positive and negative values.  This is more general than customizing 
a colormap; once you have a norm to suit your purpose, you can use it 
with any colormap.

Maybe this is actually what you are already doing, but I wanted to point 
it out here in case some readers are not familiar with this 
colormap+norm strategy.

Eric

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