How to Ensure Matplotlib Colorbars Match Graph Height?

How to Accurately Match Colorbar Height to Matplotlib Graph

When displaying images using Matplotlib's imshow, the colorbar often appears disproportionately tall compared to the graph, as shown in the example provided. To resolve this issue and ensure that the colorbar matches the height of the graph, follow these steps:

The recommended solution is to adjust the fraction and pad arguments within the plt.colorbar function. Experimenting with different values may be necessary to achieve the desired result, but the values mentioned in the answer, fraction=0.046 and pad=0.04, have proven to be effective in several cases.

By setting fraction to 0.046, the colorbar will be reduced to approximately 4.6% of the total figure height. pad determines the vertical spacing between the colorbar and the main axes, with a value of 0.04 providing a small amount of padding.

This solution avoids the need to manually adjust the colorbar size after creating the graph and ensures that it remains proportional to the graph size, even when the display dimensions are changed. Additionally, it avoids using the sharex or sharey arguments, which can alter the aspect ratio of the plot.

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