How to Make Matplotlib Colorbars Scale Proportionally to the Graph Height?

Scaling the Matplotlib Colorbar to Match the Graph Height

Matplotlib's imshow graphs often display colorbars with different heights than the graph itself. Resizing the colorbar manually is a cumbersome process, and using external tools afterward is not ideal.

Fortunately, there's a simple solution to match the colorbar height:

plt.colorbar(im, fraction=0.046, pad=0.04)

These values adjust the colorbar's size and spacing to scale it appropriately to the plot, regardless of the display's resolution.

The fraction parameter controls the relative width of the colorbar. Setting it to 0.046 makes the colorbar roughly 4.6% of the plot's width. The pad parameter adds some additional spacing between the colorbar and the plot's axes to prevent them from overlapping.

By using this combination of parameters, the colorbar remains proportionate to the plot, maintaining a clean and consistent appearance without the need for manual adjustments or external processing.

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