Creating 3D array from 2D with increment

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Jiayun Liu ，2022-10-13

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https://ww2.mathworks.cn/matlabcentral/answers/1824598-creating-3d-array-from-2d-with-increment

评论： Jiayun Liu ，2022-10-13

Suppose I have a 2D array of integers A and I want to create another 2D array B = A+1 and I want to combine them into 1 3D array. I will do something like cat(3,A,B). Now I want to add another 2D array C = B+1 to it. The simple way I can think of would be to loop it through a for loop. I was wondering if there are any other way of doing this without using for loop.

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Answer 1

Chunru 2022-10-13

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https://ww2.mathworks.cn/matlabcentral/answers/1824598-creating-3d-array-from-2d-with-increment#answer_1073358

A = randi([1, 10], [3, 5])
A = 3×5
     5     9     3     6     5
     7     8     1     8     6
     9     3     8    10     1
C = A + reshape(0:2, [1,1,3])    % increment 0, 1, 2 for example
C = 
C(:,:,1) =

     5     9     3     6     5
     7     8     1     8     6
     9     3     8    10     1


C(:,:,2) =

     6    10     4     7     6
     8     9     2     9     7
    10     4     9    11     2


C(:,:,3) =

     7    11     5     8     7
     9    10     3    10     8
    11     5    10    12     3