% Example matrix
x(:,:,1) = [1 2 3; 4 5 6];
x(:,:,2) = [1 2 3; 4 5 6]+6;
x(:,:,3) = [1 2 3; 4 5 6]+12;
x(:,:,4) = [1 2 3; 4 5 6]+18;
n = sqrt(size(x,3));
x2 = mat2cell(x, size(x,1), size(x,2), ones(1,size(x,3)));
x2 = reshape(x2,n,n)';
x2 = cell2mat(x2);
x2 =
1 2 3 7 8 9
4 5 6 10 11 12
13 14 15 19 20 21
16 17 18 22 23 24
Example for another matrix x
% Example matrix
x(:,:,1) = [1 2 3; 4 5 6; 7 8 9];
x(:,:,2) = [1 2 3; 4 5 6; 7 8 9]+9;
x(:,:,3) = [1 2 3; 4 5 6; 7 8 9]+18;
x(:,:,4) = [1 2 3; 4 5 6; 7 8 9]+27;
x(:,:,5) = [1 2 3; 4 5 6; 7 8 9]+36;
x(:,:,6) = [1 2 3; 4 5 6; 7 8 9]+45;
x(:,:,7) = [1 2 3; 4 5 6; 7 8 9]+54;
x(:,:,8) = [1 2 3; 4 5 6; 7 8 9]+63;
x(:,:,9) = [1 2 3; 4 5 6; 7 8 9]+72;
n = sqrt(size(x,3));
x2 = mat2cell(x, size(x,1), size(x,2), ones(1,size(x,3)));
x2 = reshape(x2,n,n)';
x2 = cell2mat(x2);
x2 =
1 2 3 10 11 12 19 20 21
4 5 6 13 14 15 22 23 24
7 8 9 16 17 18 25 26 27
28 29 30 37 38 39 46 47 48
31 32 33 40 41 42 49 50 51
34 35 36 43 44 45 52 53 54
55 56 57 64 65 66 73 74 75
58 59 60 67 68 69 76 77 78
61 62 63 70 71 72 79 80 81
