randperm
显示 更早的评论
How can I use randperm for a nx2 matrix?
1 个评论
Dr. Seis
2011-11-11
"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?
回答（3 个）
Jonathan
2011-11-11
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 个评论
Jonathan
2011-11-11
@Miriam, to permute the columns separately do this.
D = A;
D(:,1) = D(randperm(n),1);
D(:,2) = D(randperm(n),2);
Jan
2011-11-11
A = rand(100, 2);
Dim = 1;
B = Shuffle(A, Dim);
类别
在 帮助中心 和 File Exchange 中查找有关 Logical 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
