Shuffle n rows of a matrix

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.

Answer 1

[Ameer Hamza]

Try this

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

[REMYA K]

Thank you..

[Ameer Hamza]

I am glad to be of help!

[REMYA K]

Will you please help me to shuffle in between rows?,

like shuffle rows from 3-7 only and all other rows remains same in a 10*10 matrix.

[Ameer Hamza]

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]

It works...Thanks