random permutation for a matrix

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shobhit mehrotra 2015-4-15

评论： shobhit mehrotra 2015-4-16

I have a 2x5 matrix, A. I want to randoming sort both of the rows together, so that the second is still a function of the first row.

A = [ 2 5 9 11 23; 4 1 7 9 12]

One random permutation may look like

B= [5 11 9 2 23; 1 9 7 4 12]

The 1st and 2nd row are still the same ratio

Im trying to use the function randperm

Thanks

pfb 2015-4-15

That should be easy

i = randperm(5);

should give you the permutated indices, so that

B = A(:,i);

is the permutation of the columns of A according to those new indices.

Thanks!

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