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bi-directional perceptually flat colormaps in matplotlib? #11508

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choldgraf opened this issue Jun 26, 2018 · 9 comments
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bi-directional perceptually flat colormaps in matplotlib? #11508

choldgraf opened this issue Jun 26, 2018 · 9 comments
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v3.1.0

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@choldgraf
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A few folks have asked me how they can plot a perceptually flat colormap (like viridis) for bi-directional data (AKA, data that you'd use coolwarm or RdBu for). I searched around but didn't find anything like this in matplotlib. I know it's been discussed before, does anyone know if those discussions went anywhere?
@choldgraf
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Ah I found #6254 which implements a circular colormap. Has something similar been done for a diverging colormap?

@dstansby dstansby added this to the v3.1 milestone Jun 26, 2018
@dstansby
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This would be a really great thing to add, and I don't think it already exists.

@choldgraf
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are you gonna be at scipy @dstansby ? or @tacaswell ? maybe we can make it into a quick hack :-)

@afvincent
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@choldgraf It looks like cmocean may have a few of them, namely "balance", "delta", and "curl".

@dstansby
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dstansby commented Jul 9, 2018

@choldgraf I won't be at scipy, but I'm in Berkeley now for 3 weeks, happy to spend an afternoon hacking this together/doing other Matplotlib things if you'll be around at all.

@choldgraf
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@dstansby cool! I'll be back from Scipy starting Friday. Whereabouts are you working? You could probably use the BIDS space if you need a place to hang.

@ImportanceOfBeingErnest
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Possibly related: #6033

@choldgraf
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ooh nice find

@jklymak
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jklymak commented Feb 4, 2019

I'll close in favour of #6033

@jklymak jklymak closed this as completed Feb 4, 2019
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@jklymak @choldgraf @dstansby @afvincent @ImportanceOfBeingErnest