On Oct 1, 2009, at 6:06 AM, 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")
sample.strat<-getdata(sampleframe,str)
sample.strat
If you want the number of rows in sample.strat then length(H) is the
wrong approach since that is the original (unsampled) object.
length(H)
i get:
length(H)
[1] 100
Desire to get:
length(H)
[1] 20
I cannot tell what packages you have loaded and strata is not in the
sampling package which I guessed (wrongly) was where you were getting
"getdata". When you post code you should precede that code with calls
that load any non-base packages.
In later posting you ask for ways to calculate "the sum" but you do
not say what it is that you want the sum of.... . Our abilities to
read minds is extremely limited.
--
David Winsemius
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