Demo Colorbar with Axes DividerΒΆ

The make_axes_locatable function (part of the axes_divider module) takes an existing axes, creates a divider for it and returns an instance of the AxesLocator class. The append_axes method of this AxesLocator can then be used to create a new axes on a given side ("top", "right", "bottom", or "left") of the original axes. This example uses Axes Divider to add colorbars next to axes.

demo colorbar with axes divider
import matplotlib.pyplot as plt
from mpl_toolkits.axes_grid1.axes_divider import make_axes_locatable

fig, (ax1, ax2) = plt.subplots(1, 2)

im1 = ax1.imshow([[1, 2], [3, 4]])
ax1_divider = make_axes_locatable(ax1)
# add an axes to the right of the main axes.
cax1 = ax1_divider.append_axes("right", size="7%", pad="2%")
cb1 = fig.colorbar(im1, cax=cax1)

im2 = ax2.imshow([[1, 2], [3, 4]])
ax2_divider = make_axes_locatable(ax2)
# add an axes above the main axes.
cax2 = ax2_divider.append_axes("top", size="7%", pad="2%")
cb2 = fig.colorbar(im2, cax=cax2, orientation="horizontal")
# change tick position to top. Tick position defaults to bottom and overlaps
# the image.

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