[Numpy-discussion] sample without replacement

josef.pktd at gmail.com josef.pktd at gmail.com
Mon Dec 20 21:41:16 EST 2010

On Mon, Dec 20, 2010 at 11:28 AM, Alan G Isaac <alan.isaac at gmail.com> wrote:
> I want to sample *without* replacement from a vector
> (as with Python's random.sample).  I don't see a direct
> replacement for this, and I don't want to carry two
> PRNG's around.  Is the best way something like  this?
>        permutation(myvector)[:samplesize]

python has it in random

sample( population, k)
Return a k length list of unique elements chosen from the population
sequence. Used for random sampling without replacement. New in version


> Thanks,
> Alan Isaac
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