Question

In python using numpy and for loops. How would I insert a multidimensional array into another multidimensional array, multiple times. For example if I defined A = [[1,2],[3,4]] and B as a four by four matrix of zeros, How would I insert A into B such that when I print B I get, [[1,2,1,2],[3,4,3,4],[1,2,1,2],[3,4,3,4]]

Answer 1

Here is am going to use modulo operator on the index of A which will loop back on the array A and will help to get the pattern. you can use (i%n) & (i%m) in A(n*m) to get this pattern.

Code :

import numpy as np
A = np.array([[1,2],[3,4]]) // converting the list to arrray
B = np.array([[0,0,0,0],[0,0,0,0],[0,0,0,0],[0,0,0,0]]) // converting the list to arrray

for i in range(4):
for j in range(4):
B[i][j] = A[i%2][j%2] // assign the values of B

print(B)

Sample Run :

[[1 2 1 2]
[3 4 3 4]
[1 2 1 2]
[3 4 3 4]]