To plot and work with NaN values in matplotlib, we can take the following steps −
Create data using numpy with some NaN values.
Use imshow() method to display data as an image, i.e., on a 2D regular raster, with a colormap and data (from step 1).
To display the figure, use show() method.
Example
import numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True data = np.array([[1., 1.2, 0.89, np.NAN], [1.2, np.NAN, 1.89, 2.09], [.78, .67, np.NAN, 1.78], [np.NAN, 1.56, 1.89, 2.78]] ) plt.imshow(data, cmap="gist_rainbow_r") plt.show()