How to randomly select entire row from matrix?

Hello! I have a matrix of size 198220*15, which contains year and physical characteristics of this year. And I need to randomly select a 100 rows from it, but it should be entire row selected randomly, so that the year and it's characteristics didn't mess up during this process.

I tried:

k = randperm(size(kx3,1));

mnew = kx3(k(1:100),:);

but it just selects independantly from each column, so characteristics of year 2003 go to year 2011, etc.

Thank you in advence!

Answer 1

[Wayne King]

A = randn(198220,15);
idx = sort(randperm(size(A,1),100));
B = A(idx,:);

[Liza]

It worked! :) Thank you a lot!!!

[Image Analyst]

Mark it as Accepted then.