How can I shuffle a matrix

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ainiya aziza
ainiya aziza on 14 Jan 2018
Commented: ainiya aziza on 17 Jan 2018
I have matrix nxn, A=[1 2 3 4;5 6 7 8; 9 10 11 12; 13 14 15 16]; I want to shuffle this matrix, which will give AB=[1 2 5 6; 3 4 7 8; 9 10 13 14; 11 12 15 16]. Any help will be highly appreciated, Rosi.

Accepted Answer

Stephen23
Stephen23 on 14 Jan 2018
Here are two methods to rearrange it according to your question. Adjust to suit the size of your matrix.
>> A=[1 2 3 4;5 6 7 8; 9 10 11 12; 13 14 15 16]
A =
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
>> cell2mat(reshape(cellfun(@(m)reshape(m.',2,2).',num2cell(A,2),'uni',0),2,2).')
ans =
1 2 5 6
3 4 7 8
9 10 13 14
11 12 15 16
>> reshape(permute(reshape(permute(reshape(A.',2,2,[]),[1,3,2]),4,2,[]),[1,3,2]),4,[]).'
ans =
1 2 5 6
3 4 7 8
9 10 13 14
11 12 15 16
  1 Comment
ainiya aziza
ainiya aziza on 17 Jan 2018
thank you, this is the answer I am looking for

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More Answers (1)

Roger Stafford
Roger Stafford on 14 Jan 2018
AB = A;
AB(2,9,6,13,4,11,8,15) = AB(9,2,13,6,11,4,15,8);
  3 Comments
ainiya aziza
ainiya aziza on 17 Jan 2018
thank you for the answer

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