How can I create a simple matrix of 4 by 4 using a "for" loop. to make a diagnol of 1's starting from top right to bottom left?

Not sure where to start this is my second time using MATLAB, thanks!

[Jan]

Please try it. What are the indices of the 1s?

Answer 1

[Walter Roberson]

Hint: the indices sum to 5.

[Jan]

+1: This is no solution of a homework question.

Answer 2

[Michael Joslin]

Heres a way to do it without a for loop if your interested:

a = ones(4); a = diag(diag(a)); rot90(a)

This might not be too helpful if all of your other elements are not zero.

Answer 3

[Sean de Wolski]

I = fliplr(eye(4));

[Walter Roberson]

This does not go top right to bottom left.

[Sean de Wolski]

fixed