Matshow plot

May 10, 2023

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Visualize an array using Matplotlib's matshow function. The first example shown below plots a 2D array and the second example plots a diagonal array.

import matplotlib.pyplot as plt
import numpy as np

a = np.random.rand(20, 20)

fig, ax = plt.subplots()
im = ax.matshow(a)
fig.colorbar(im, ax=ax)

plt.show()

import matplotlib.pyplot as plt
import numpy as np

b = np.diag(range(15))

_, ax = plt.subplots()
ax.matshow(b, cmap='binary')

plt.show()