On Thu, Jan 13, 2005 at 01:50:38PM +0100, [EMAIL PROTECTED] wrote:
> I need to divide the array
>
> > A<-c(1:200)
>
> into two subsets at random. Therefore I use the function "sample" in R:
I suggest a slightly different approach which is probably faster than
using setdif() or %in% and friends:
a <- 1:200
i <- sample(1:200, 100)
s1 <- a[i]
s2 <- a[-i]
cu
Philipp
--
Dr. Philipp Pagel Tel. +49-89-3187-3675
Institute for Bioinformatics / MIPS Fax. +49-89-3187-3585
GSF - National Research Center for Environment and Health
Ingolstaedter Landstrasse 1
85764 Neuherberg, Germany
http://mips.gsf.de/staff/pagel
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