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Changing color based on value in Matplotlib

schedule Aug 12, 2023
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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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