Question

How to replace all zeros with non-zero values in a numpy 2D array (matrix) with Python

Answer 1

import numpy as np

arr = np.array([[1,0,1,0], [0,0,1,0], [0,0,0,1], [0,1,0,0]])

arr[np.where(arr==0)] = 3

print(arr)




'''
run:

[[1 3 1 3]
 [3 3 1 3]
 [3 3 3 1]
 [3 1 3 3]]

'''

 

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