On Thu, 2009-10-01 at 10:06 +0000, KABELI MEFANE wrote:
> Dear Helpers
>
> I have a sample frame and i have sampled from it using three methods and now
> i want to calculate the statistics but i only get the population parameters.
>
> H <- matrix(rnorm(100, mean=50000, sd=5000))
> sampleframe=data.frame(type=c(rep("H",100)),value=c(H))
> sampleframe
>
> str=strata(sampleframe,c("type"),size=c(20,), method="srswor")
Try using
str=strata(sampleframe,c("type"),size=20, method="srswor")
or better
str <- strata(sampleframe,c("type"),size=20, method="srswor")
--
Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology
Brazil
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