i want to get top right n x n matrix out of Nx N, I programmed it in following way but i got answer two times. so what is my mistake?

a = top_right(N,n)

[j , k] = size(N);

a = N([1:1:j-(j-n) , 1:1:k-(k-n)],1:n);

end

Answer 1

[James Tursa]

For "top right corner," the column indexing should not start at 1. E.g.,

a = N(1:n,end-n+1:end); % <-- Back off from end instead of starting from 1

But you might want to add code to cover the cases where the dimensions of N are smaller than n.