在matplotlib中定义颜色图的中点 [英] Defining the midpoint of a colormap in matplotlib

问题描述

我想设置一个色彩图的中间点，即我的数据从-5到10，我希望零成为中间点.我认为实现此目的的方法是归一化规范化并使用规范，但是我没有找到任何示例，而且我不清楚我到底要实现什么.

I want to set the middle point of a colormap, ie my data goes from -5 to 10, i want zero to be the middle. I think the way to do it is subclassing normalize and using the norm, but i didn't find any example and it is not clear to me, what exactly i have to implement.

推荐答案

请注意，在matplotlib版本3.1中，

Note that in matplotlib version 3.1 the DivergingNorm class was added. I think it covers your use-case. It can be used like this:

from matplotlib import colors
colors.DivergingNorm(vmin=-4000., vcenter=0., vmax=10000)

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