MATLAB: How to create a combination of matrix values in pairs

Question

I have a matrix lets say:

A=[1 4;2 5;3 6];

and i want to convert it into a matrix where each value in the first column is matched with each value in the second column:

B= 1 4
   1 5
   1 6
   2 4
   2 5
   2 6
   3 4
   3 5
   3 6

is there a vectorized way to do this?

Answer 1

If you have deep learning toolbox

A=[1 4;2 5;3 6];
B = combvec(A(:,2).', A(:,1).').';

Result

>> B
B =
     4     1
     5     1
     6     1
     4     2
     5     2
     6     2
     4     3
     5     3
     6     3

Alternative without deep learning toolbox

A=[1 4;2 5;3 6];
[i1, i2] = ndgrid(1:size(A,1));
B = [A(i2(:),1) A(i1(:),2)];