Shuffle n rows of a matrix

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REMYA K 2020-11-15

评论： REMYA K 2020-11-16

I have a 5*5 matrix, I want to shuffle first 3 rows of this but last two rows should remains same..any body please help.

Ameer Hamza 2020-11-15

Try this

M = rand(5);
idx = [randperm(3) 4 5];
M_shuffled = M(idx, :)

Ameer Hamza 2020-11-15

Yes, you can do it like this

M = rand(10);
n = 3;
m = 7;
idx = [1:n-1 randperm(m-n+1)+(n-1) m+1:size(M,1)];
M_shuffled = M(idx, :)

REMYA K 2020-11-16

It works...Thanks

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