How to find the nine biggest numbers?

I have a n*n matrix and I want to find nine biggest numbers in it. How can I do it in MATLAB?

Answer 1

[Tom]

A = rand(9);

m = sort(A(:),'descend');
m(1:9)

Answer 2

[David Sanchez]

Sort your matrix in descending order:

m = rand(5,4); % example matrix
[rows cols] = size(m);
m2 = reshape(m,rows*cols,1);
xx = sort(m2,'descend')

grab the elements you want

my_elements = xx(1:9);