How to reshape a 2D to 3D matrix without using loops (reshape) and keeping a particular order of the elements// Wrong arragement of elemts after using "reshape"

I've a problem using the reshape function. I've a Matrix A: A =

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

I want to change it to a 3D Matrix with the size 4x4x3. When I use reshape like this:

A2=repmat(A,4,4,3); the result is:

A2(:,:,1) =

     1     1     1     2
     5     5     5     6
     9     9     9    10
    13    13    13    14

A2(:,:,2) =

     2     2     3     3
     6     6     7     7
    10    10    11    11
    14    14    15    15

A2(:,:,3) =

     3     4     4     4
     7     8     8     8
    11    12    12    12
    15    16    16    16

The result I want though is:

A2(:,:,1) =

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

A2(:,:,2) =

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

A2(:,:,3) =

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

In the real data set I've different values, I just chose (1:16) 3 Times to show in what order I want to rearrange the data/Matrix.

Thanks a lot!

Answer 1

[Azzi Abdelmalek]

   A=[1     2     3     4
     5     6     7     8
     9    10    11    12
    13    14    15    16
     1     2     3     4
     5     6     7     8
     9    10    11    12
    13    14    15    16
     1     2     3     4
     5     6     7     8
     9    10    11    12
    13    14    15    16]
A2=permute(reshape(A',4,4,[]),[2 1 3])

[Tim]

Thanks a lot! That works!