MATLAB: Find indicies of k smallest matrix elements

Question

I'm trying to find the indicies of smallest k matrix elements.

For example if I have

A = [10 5 2; 34 5 21; 4 6 8];

and I want to find the smallest 2 elements indicies then I want indicies 7 and 3.

Answer 1

[~, indices] = sort(A(:), 'ascend');
ind = indices(1:k);