selecting random

i have made a vector like this x(1,i), i=1 to 10e6 in a m.file(this is my output format ) now i want to choose randomly 10000 of them and then showing those vectors.

Answer 1

[Andrei Bobrov]

x = rand(1,10e6);
I = randperm(10e6);
xout = x(I(1:1e4));

Answer 2

[Clemens]

If you want with laying back you could get random indices with:

ind = randi(1e6,1e4,1);
xout = x(ind);