[Matplotlib-users] How to make a bi-variate or 2-dimension colormap?

[Chao YUE]

Dear all matplotlib users,

I am trying to make a geographical map with colors, in which the colors of
pixels will depend on 2-dimensions of (x,y), like the one attached from one
publication. I searched online and this is where I arrive:

https://gist.github.com/ChaoYue/81eb01b558f068f11ee741c56557a6a2

To put it short, I know how to pick up color by x-axis value, and use
y-axis value as an indicator of either saturation, or brightness or
transparency of the color. Or somewhere to convert this (x,y) information
back to linear space and select color from a matplotlib colormap. But is
there some way that I can use different colors for each corner of the small
square as shown in the example, and somewhere interpolate the colors in
between? like the one attached?

These are the online sources that help me, even though I am not sure I
fully understand the tricks inside them ...:

http://stackoverflow.com/questions/15207255/is-there-any-way-to-use-bivariate-colormaps-in-matplotlib

https://github.com/matplotlib/matplotlib/issues/4369

Thanks a lot in advance for any suggestions,

Cheers,
Chao

Dear all matplotlib users,
I am trying to make a geographical map with colors, in which the colors of
pixels will depend on 2-dimensions of (x,y), like the one attached from one
https://gist.github.com/ChaoYue/81eb01b558f068f11ee741c56557a6a2
To put it short, I know how to pick up color by x-axis value, and use
y-axis value as an indicator of either saturation, or brightness or
transparency of the color. Or somewhere to convert this (x,y) information
back to linear space and select color from a matplotlib colormap. But is
there some way that I can use different colors for each corner of the small
square as shown in the example, and somewhere interpolate the colors in
between? like the one attached?
These are the online sources that help me, even though I am not sure I
http://stackoverflow.com/questions/15207255/is-there-any-way-to-use-bivariate-colormaps-in-matplotlib
https://github.com/matplotlib/matplotlib/issues/4369
Thanks a lot in advance for any suggestions,
Cheers,
Chao
--
http://www.globalcarbonatlas.org/
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Chao YUE
postdoc at LSCE
CEA-Ormes des Merisiers, F-91191 GIF-SUR-YVETTE CEDEX
Tel: [phone]
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