[R] Seed of Random number generation

Uwe Ligges ligges at statistik.tu-dortmund.de
Sat May 2 17:33:47 CEST 2009

cls59 wrote:
> RON70 wrote:
>> Dear all, is it possible to extract the seed that was used for some random
>> number generation? For example suppose I draw a random sample of size 1000
>> from a normal population :
>> rnorm(1000)
>> Now I want to know what seed R used for that sample generation. Any way
>> out?
>> Thanks and regards,
> I believe R creates a random seed after a random number generation function
> such as rnorm is called. The seed is stored in the vector .Random.seed  .
> See ?RNG for more info on how to load, save and tweak the random seed.

... which means that you cannot get the seed that has been used in a 
step before, but you can save (or set) the seed before calling 
rnorn(1000), of course.

Uwe Ligges

> -----
> Charlie Sharpsteen
> Undergraduate
> Environmental Resources Engineering
> Humboldt State University

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