[R] how to initialize random seed properly ?

A.J. Rossini rossini at blindglobe.net
Wed Jun 9 21:48:31 CEST 2004

For reproducibility, you probably want to specify the starting seeds.
I'd worry about using systime.   (for selecting the seeds, you might
consider random draws from a uniform).


ryszard.czerminski at pharma.novartis.com writes:

> I want to start R processes on multiple processors from single shell 
> script
> and I want all of them to have different random seeds.
> One way of doing this is
>         sleep 2 # (with 'sleep 1' I am often getting the same number)
>                ...
>         set.seed(unclass(Sys.time()))
> Is there a simpler way without a need to sleep between invoking
> different R processes ?
> Ryszard
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rossini at u.washington.edu            http://www.analytics.washington.edu/ 
Biomedical and Health Informatics   University of Washington
Biostatistics, SCHARP/HVTN          Fred Hutchinson Cancer Research Center
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