Matshow

matshow visualizes a 2D matrix or array as color-coded image.

import matplotlib.pyplot as plt
import numpy as np

# a 2D array with linearly increasing values on the diagonal
a = np.diag(range(15))

plt.matshow(a)

plt.show()

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References

The use of the following functions and methods is shown in this example:

import matplotlib
matplotlib.axes.Axes.matshow
matplotlib.pyplot.matshow

Out:

<function matshow at 0x7f73be8160d0>