Unrepeated random numbers

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Raviteja 2012-2-13

编辑： animati 2013-10-10

I have a vector S

>> S=[1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10];

I want to randomly pic 5 elements which are unrepeated.

How to do that?

Raviteja 2012-2-13

I got it...

>>S(randperm(5))

Sean de Wolski 2012-2-13

No, I don't think that's what you want. That will always pick the first 5 elements in a new order, the 6th-nth elements will never be selected.

Jonathan Sullivan's solution appears to meet your question's intent.

Jonathan Sullivan 2012-2-13

L = length(S);
k = 5;
ind = randperm(L,k);
S_rand = S(ind);

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