On Thu, 2009-10-01 at 13:34 +0000, KABELI MEFANE wrote:
> ## package sampling
>
> stra=strata(sampleframe,c("type","value","rating"),size=c(20,80,200,300,400),
> method="srswor")
> sample.strat<-getdata(sampleframe,stra)
>
> sample.strat
>
Try:
stra<-strata(sampleframe,size=c(20,80,200,300,400),method="srswor")
sample.strat<-getdata(sampleframe,stra)
sample.strat
--
Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology
Brazil
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