Displaying 3 results from an estimated 3 matches for "stratanames".
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2012 Feb 01
1
package sampling, function strata
Dear all,
I have to select 122 stratified random samples from a population of
>3900 cells. I have 41 strata and I have to draw a different number of
samples from them(between 2 and 8).
I have tried to apply the funtion strata following the instruction in
the manual:
strata(dataframe, stratanames=NULL, size, method=c("srswor"),
pik,description=TRUE)
but I get the error message
Error in data.frame((1:nrow(data))[srswor(size, nrow(data)) == 1], rep(size/nrow(data), :
arguments imply differing number of rows: 3, 122
My stratanames and size vectors have the same length, 41 (th...
2010 Dec 11
2
package sampling
Hi R users.
I have a problem with function strata in sampling packages.
> st0 = strata(dom, stratanames="stratas", size=sample.size,
method="systematic",pik, FALSE)
Error in sort.list(y) : 'x' must be atomic for 'sort.list'
Have you called 'sort' on a list?
In previous version of R 2.9.1 and previous version of package sampling this
code worked well and no...
2009 Apr 28
1
Random Sample with Unique function
Dear R-users
I have a dataset of 243 lines with replicate information for 20 different individuals (ID).
I would like to randomly sample this dataset 100 times with a selection of unique IDs in each sample.
First to create a random sample I have;
cc<-read.table(blah.blah.blah)
names(cc)
[1] "CALL" "CONTEXT" "ORDER" "ID"