How to show numpy 2d array as grayscale image in Jupyter Notebook? [duplicate]

Question

I have numpy array with the following properties.

np.shape(I)
(300, 300)

np.min(I)
115

np.max(I)
250

Unfortunately, when I plot it, I get something greenish bluish.

How to get normal grayscale palette?

Answer 1

Try this one:

imgplot = plt.imshow(I, cmap='gray')