How to take a rectangular matrix of numbers and turn it into a matrix of the form (row, column, number)?

I want to take a matrix of around 300 rows and 300 columns and put it into the form (row, column, number)

Any help would be appreciated a lot.

Thanks :)

Answer 1

[Michael Haderlein]

If m is your matrix:

m=rand(3,2);
[1+mod(0:numel(m)-1,size(m,1))' 1+fix((0:numel(m)-1)/size(m,1))' m(:)]

[Edward Boyd]

Awesome, you're a champion!