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selecting random

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milad babaei
milad babaei 2011-6-8
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.

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回答（2 个）

Andrei Bobrov
Andrei Bobrov 2011-6-8
x = rand(1,10e6);
I = randperm(10e6);
xout = x(I(1:1e4));
Clemens
Clemens 2011-6-8
If you want with laying back you could get random indices with:
ind = randi(1e6,1e4,1);
xout = x(ind);

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