randperm
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How can I use randperm for a nx2 matrix?
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Dr. Seis
on 11 Nov 2011
"randperm" only takes 1 scalar input argument. Can you give a sample of an input nx2 matrix AND what you would expect the output to be?
Answers (3)
Jonathan
on 11 Nov 2011
If you want to randomly permute the rows, do something like the following.
n = 5;
A = reshape(1:2*n, n, 2)
B = A(randperm(n), :)
If you want to randomly permute all elements, do something like this instead.
C = reshape(A(randperm(2*n)), n, 2)
1 Comment
Jonathan
on 11 Nov 2011
@Miriam, to permute the columns separately do this.
D = A;
D(:,1) = D(randperm(n),1);
D(:,2) = D(randperm(n),2);
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