How to create a 10-by-10 matrix that is all zeros except for ones in the diagonal (runnig from top left to bottom right) using a for-loop?

Hello everyone, would someone be so kind as to help me solve this problem? I searched the diagonal documentation and read a suggestion about it in the forum (where they suggested the randperm function), but unfortunately I couldn’t solve it.

Would you be so kind as to suggest a very simple method since I am in the beginning and I know only a few functions. Thank you very much!

[David Jacob]

Hey,

You don't necessarily need a for loop in order to do this. There is a MATLAB function for defining identity matrices:

I = eye(10);

This will do the job. If you prefer using a for loop instead pre-define a 10-by-10 matrix with zeros(10) and fill the diagonal elements with a 1.

I = zeros(10);
for k=1:10
    I(k,k) = 1;
end

[Giulia D'Avanzo]

Thank you so much! you were very kind! :)

Answer 1

[Alan Stevens]

You can just ue the command

eye(10)

[Giulia D'Avanzo]

Thank you, i'll try!