MATLAB: How to know the indices of multiple max values

Question

hi there!

I'm having problem about identifying the indices(position) of a multiple max values.

example of input:

A=[4 5 9 9]

how can i know the indices of those 9's?

Answer 1

One way:

A = [4 5 9 9];
maxval = max(A);
lia = ismember(A,maxval);
idx = find(lia);

or shorter

maxval = max(A);
idx = find(A == maxval);