matrix - change columns randomly

2011 10 16
1 个回答
更新时间：2020 1 7
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1 个投票

Hi, how can I change randomly the positions of entire columns in a matrix [nxm]? For example, I want to change my matrix
A=[ 1 2 3 5 4 ;
2 2 2 2 2 ;
4 5 6 7 7 ;
8 9 8 8 8 ;
9 9 9 9 9 ]; to change into
B=[ 3 5 4 2 1;
2 2 2 2 2;
6 7 7 5 4;
8 8 8 9 8;
9 9 9 9 9];
Thank you :)

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回答（1 个）

Wayne King
Wayne King 2011-10-16

1 个投票

A random shuffling of the columns of A. One way:
cols = size(A,2);
P = randperm(cols);
B = A(:,P);

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Jonny
Jonny
2011-10-16

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Ruchi Agarwal
Ruchi Agarwal
2020-1-7

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