Problem 43689. Make an identity matrix whose diagonal elements are 1:n

For a given input n, make an n by n identity matrix that contains the elements 1:n along its diagonal. For example, if input=5:

 output = [1 0 0 0 0;
           0 2 0 0 0;
           0 0 3 0 0;
           0 0 0 4 0;
           0 0 0 0 5]

Solve

Last Solution submitted on May 25, 2020

goc3 on 21 Dec 2016

This problem's title and description were cleaned up and additional test cases were added.

basics test