[R] random sequence

Prof Brian Ripley ripley at stats.ox.ac.uk
Mon Apr 26 18:28:03 CEST 1999

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> From: yudi at hermes.ucd.ie
> Date: Mon, 26 Apr 1999 13:38:10 +0000 (GMT)
> Subject: [R] random sequence
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> Dear All,
From: yudi at hermes.ucd.ie

> How can I get the same stream of random numbers in R and S?
> I know one of the generators in R is Super-Duper also used in S-plus,

Sorry, but no, it isn't quite the same as I understand them. S-PLUS
skips members of the sequence occasionally. But it depends what you
mean here: S-PLUS != S and I very much doubt you have S.

I don't know why you want to do this: if you use any of the built-in
operations (such as rnorm) you will get different answers as different
algorithms are used.  If all you want is a stream of runif() type,
implement your version on both systems to be sure.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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