How would I make a script to find the Diagonal of a matrix?

I know you could simply use the Diag function but I am playing around with making scripts and I am curious.

Answer 1

[Star Strider]

Hi, Curious Alicia Gillies!

I would do this:

M = ...;                                    % Your Matrix
for k = 1:min(size(M))
    diagM(k) = M(k,k);
end

and to create a diagonal matrix from the same ‘diagM’ (or any other) vector:

N = eye(numel(diagM)) .* diagM(:);

Answer 2

[Walter Roberson]

diagM = @(M) M(1:size(M,1)+1:size(M,1)*min(size(M))).';