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Changing color based on value in Matplotlib

Matplotlib
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Cookbooks
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Colors Cookbook
schedule Jul 1, 2022
Last updated
local_offer PythonMatplotlib
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To change the color of a data point based on its value in Matplotlib:

x = [1,2,3]
y = [4,5,6]
z = [100, 200, 300]
plt.scatter(x, y, c=z, cmap=plt.cm.gray_r, s=200, edgecolor='black')
plt.show()

Here, we used gray_r to make the larger value darker in color (r stands for reverse).

This gives you the following:

Matplotlib has numerous color maps built into it, like plt.cm.autumn:

x = [1,2,3]
y = [4,5,6]
z = [100, 200, 300]
plt.scatter(x, y, c=z, cmap=plt.cm.autumn_r, s=200)
plt.show()

This gives you the following:

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Published by Isshin Inada
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