October 2018
Beginner to intermediate
676 pages
18h 30m
English
Content preview from Matplotlib 3.0 Cookbook
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Previously, we have learned how to create discrete user-defined colormaps. Now let's see how to create user-defined continuous colormaps. The difference is in the color specification. In discrete colormaps, we will have as many RGB tuples as the number of clusters we have in data, so that each color represents one cluster. However, in continuous colormaps, the color has to move gradually from one end of the spectrum to the other, along the complete data range.
As we know, each color is represented with a tuple of three numbers: R, G, and B channels. In some cases, the fourth channel, alpha, is also used to represent the transparency (or opaqueness) of the colors. Here is how we need to specify the colors. Let's take an example: ...
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