How to permute the rows and columns in a matrix ?

Question

Nguyen Trong Nhan 2013-12-30

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https://ww2.mathworks.cn/matlabcentral/answers/111038-how-to-permute-the-rows-and-columns-in-a-matrix

回答： Daniel Morais 2017-3-21

for example: I have matrix A: A = [1 2 3 4;5 6 7 8;9 10 11 12;13 14 15 16] how to permute between column 1 and column 4 ? how to permute between row 1 and row 3 ? thanks

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Answer 1

Wayne King 2013-12-30

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https://ww2.mathworks.cn/matlabcentral/answers/111038-how-to-permute-the-rows-and-columns-in-a-matrix#answer_119668

编辑：Wayne King 2013-12-30

在 MATLAB Online 中打开

Swapping the columns

 idx = [4 2 3 1];
 B = A(:,idx);

Swapping the rows

 idx = [3 2 1 4];
 C = A(idx,:);

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Answer 2

Daniel Morais 2017-3-21

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Utilize x = x( : , randperm(c)), onde x é a matriz e c o número de colunas de x. O mesmo vale para a permutação de linhas: x = x( randperm(l) , : ) onde l é o número de linhas.