How to quickly change 3D to 2D Matrix

I've a Matrix e.g.

A(:,:,1) =

     1     1     1
     2     2     2
     3     3     3

A(:,:,2) =

     4     4     4
     5     5     5
     6     6     6

A(:,:,3) =

     7     7     7
     8     8     8
     9     9     9

As a result I want a Matrix "B" that is just 2D in the following shape:

B =

     1     1     1
     2     2     2
     3     3     3
     4     4     4
     5     5     5
     6     6     6
     7     7     7
     8     8     8
     9     9     9

I played around with reshape() and permute() or repmat() but couldn't get to the desired result. I solved the problem with a loop but I want to avoid loops!

Thanks!

Answer 1

[Andrei Bobrov]

B = reshape(permute(A,[2 1 3]),size(A,2),[])';

or

p = num2cell(A,[1 2]);
B = cat(1,p{:});

[Tim]

perfect! Thanks!