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import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.axes_grid1.axes_divider import HBoxDivider
import mpl_toolkits.axes_grid1.axes_size as Size
def make_heights_equal(fig, rect, ax1, ax2, pad):
# pad in inches
h1, v1 = Size.AxesX(ax1), Size.AxesY(ax1)
h2, v2 = Size.AxesX(ax2), Size.AxesY(ax2)
pad_v = Size.Scaled(1)
pad_h = Size.Fixed(pad)
my_divider = HBoxDivider(fig, rect,
horizontal=[h1, pad_h, h2],
vertical=[v1, pad_v, v2])
ax1.set_axes_locator(my_divider.new_locator(0))
ax2.set_axes_locator(my_divider.new_locator(2))
if __name__ == "__main__":
arr1 = np.arange(20).reshape((4, 5))
arr2 = np.arange(20).reshape((5, 4))
fig, (ax1, ax2) = plt.subplots(1, 2)
ax1.imshow(arr1, interpolation="nearest")
ax2.imshow(arr2, interpolation="nearest")
rect = 111 # subplot param for combined axes
make_heights_equal(fig, rect, ax1, ax2, pad=0.5) # pad in inches
for ax in [ax1, ax2]:
ax.locator_params(nbins=4)
# annotate
ax3 = plt.axes([0.5, 0.5, 0.001, 0.001], frameon=False)
ax3.xaxis.set_visible(False)
ax3.yaxis.set_visible(False)
ax3.annotate("Location of two axes are adjusted\n"
"so that they have equal heights\n"
"while maintaining their aspect ratios", (0.5, 0.5),
xycoords="axes fraction", va="center", ha="center",
bbox=dict(boxstyle="round, pad=1", fc="w"))
plt.show()
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