Reshaping a matrix in particular order

Question

Mahmood Azhar Qureshi 2021-3-31

0
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https://ww2.mathworks.cn/matlabcentral/answers/789459-reshaping-a-matrix-in-particular-order

回答： darova 2021-4-1

Hi, I have a random size matrix with rows a multiple of 7 and columns a multiple of 4. (e.g. 14x8, 28x12). I want to reshape the matrix into a 7x4xn matrix with additional values going into a third (n) dimension (e.g. 14x8 becomes 7x4x4). I know how to use reshape but it changes the order in which i want to generate the 3D matrix. As an example consider:

A = [1,2,3,4;5,6,7,8;9,10,11,12;13,14,15,16] 
% gives a 4x4 matrix like
% A =   1   2   3   4
%       5   6   7   8
%       9   10  11  12
%       13  14  15  16
%reshape(A,2,2,[]) gives
ans(:,:,1) = [1    9
              5    13]
ans(:,:,2) = [2    10
              6    14]
ans(:,:,3) = [3    11
              7    15]
ans(:,:,4) = [4    12
              8    16]
% I want to have something like this
ans(:,:,1) = [1    2
              5    6]
ans(:,:,2) = [9    10
              13    14]
ans(:,:,3) = [3    4
              7    8]
ans(:,:,4) = [11    12
              15    16]