How to Convert a 3D Matrix into Cell Array of Desire Dimension

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Muhammad 2023-6-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1988468-how-to-convert-a-3d-matrix-into-cell-array-of-desire-dimension

评论： Paul 2023-6-27

I have a matrix of N x M x Z 3D matrix. Where N x M is 2 x 100 and Z is 500. I want to convert it into cell array of Z x 1 ( 500 x 1) where each cell element will be N x M (2 x 100). How I can do this?

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Answer 1

Paul 2023-6-27

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1988468-how-to-convert-a-3d-matrix-into-cell-array-of-desire-dimension#answer_1262913

在 MATLAB Online 中打开

A = rand(2,100,500); % example data
C = squeeze(num2cell(A,[1 2])); % create cell array
whos C
  Name        Size             Bytes  Class    Attributes

  C         500x1             852000  cell               
isequal(cat(3,C{:}),A)  % verify
ans = logical
   1

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Muhammad 2023-6-27

@Paul what if I have 500 x 2 x 100 matrix to 500x1 cell array of 2x100 in each cell?

Paul 2023-6-27

在 MATLAB Online 中打开

A = rand(500,2,100);
C = num2cell(A,[2 3]);  % line 1

At this point, each elment of C is 1 x 2 x 100 and is isequal to the corresponding slice of A. For example

size(C{293})
ans = 1×3
     1     2   100
isequal(C{293},A(293,:,:))
ans = logical
   1

To make each cell 2 x 100

C = cellfun(@(c) squeeze(c),C,'UniformOutput',false); % line 2
size(C)
ans = 1×2
   500     1
size(C{293})
ans = 1×2
     2   100
isequal(C{293},squeeze(A(293,:,:)))
ans = logical
   1