MATLAB: Using “for” to create loops

Question

I am trying to create a loop to have a (ixm)x2 matrix such as:

1 1
1 2
1 3
2 1
2 2
2 3
3 1
3 2
3 3

My formulation is as follows:

i = size(input,1);
m = max(input(:,5));
for indice = 1:i;
    for indice2 = 1:m;
        Zassign = (1,[indice, indice2]);
    end
end

I am missing something in here. If you may help me, I would really appreciate it.

Answer 1

Why waste time with a loop? Code vectorization is much more beautiful!

>> [X,Y] = meshgrid(1:3);
>> mat = [X(:),Y(:)]
mat =
   1   1
   1   2
   1   3
   2   1
   2   2
   2   3
   3   1
   3   2
   3   3

And if you really want the Z's you can print them, but they cannot be stored in a numeric matrix (unless you store the character code):

>> fprintf(' Z %d %d\n',mat.')
 Z 1 1
 Z 1 2
 Z 1 3
 Z 2 1
 Z 2 2
 Z 2 3
 Z 3 1
 Z 3 2
 Z 3 3