How to reshape this matrix?

Currently I have 3 dimensional matrix of size (2,3,3)

A(:,:,1) =

     1     2     3
     4     5     6

A(:,:,2) =

     7     8     9
    10    11    12

A(:,:,3) =

    13    14    15
    16    17    18

I would like to reshape it into [6 3] matrix so that it will become

A =

     1     2     3
     4     5     6
     7     8     9
    10    11    12
    13    14    15
    16    17    18

I try to use reshape(A,[6 3]); But it return the wrong matrix

Is there any quick way to do this?

Answer 1

[Gautam Vallabha]

Test matrix

 A = rand(2,3,3);

Solution #1

 D = reshape(permute(A, [1 3 2]), [6 3])

Solution #2

 B = mat2cell(A, 2, 3, [1 1 1]); % slice into 3 cells (along dim 3)
 C = squeeze(B); % flatten from dim 3 to dim 1
 D = vertcat(C{:}); % vertically append the three matrices