making matrices that start from 0 to n

Question

I was wondering how could one make a 4*4 matrix that starts from 0 to 16?

I don't want to do it manually. imagine doing it for a 10*10 matrix that starts from 0 to 100. lol. there has to be some way to do it more efficiently than to do it manually.

Answer 1

This is easiest to do using numpy. Try the following.

import numpy as np
print(np.reshape(np.arange(16),(4,-1)))

The result:

[[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]
 [12 13 14 15]]

If you instead want the numbers to go from 1 to 16, you could simply add 1, as in

1 + np.reshape(np.arange(16),(4,-1))