matrix with absolute difference between row and column index
Solution 1:
You can use a simple nested list comprehension:
n = 5
[[abs(i-j) for j in range(n)]
for i in range(n)]
Output:
[[0, 1, 2, 3, 4],
[1, 0, 1, 2, 3],
[2, 1, 0, 1, 2],
[3, 2, 1, 0, 1],
[4, 3, 2, 1, 0]]
Or using numpy:
import numpy as np
n = 5
a = np.arange(n)
abs(a-a[:,None])