How can I find the indices of the 3 largest values in my matrix?

I have a matrix with varying values. I want to find the 3 largest values in this matrix and assign their indices to 3 different variables. How can I do this as simply as possible? Example matrix:

   99 45 93 64

   12 83 24 85

   39 71 29 13

After finding the largest values - 99,93,85. I'd like to find their respective indices (with linear indexing). So that would be 1,7,11.

   a = 1;

   b = 7;

   c = 11;

Answer 1

[Andrei Bobrov]

A = [99 45 93 64;
   12 83 24 85
   39 71 29 13];

[ii,ii] = sort(A(:),'descend');
out = ii(1:3);

[Jake]

Great! Thank you!