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I am using the same script across varying subsets of data. Encountered one subset of data where there are 0 observations from the test group, therefore need to select 0 observations from the control group.

Is there some syntax or something I am missing to select 0 observations?

    library("sampling")

    st <- replicate(10, strata(df,stratanames=c("Stratum"),size=c(2,16,20,0,19,5,26), method="srswor"))
p0wd3rd
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1 Answers1

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I also sometimes needed to select zero samples from one or more stratum but sampling::strata function never allowed it.

I ended up using pps::stratsrs function in such situations which works perfectly well and can give zero samples from any stratum you specify. Package available at https://cran.r-project.org/web/packages/pps/index.html.

Can anyone suggest other stratified sampling functions (from any package) which can take 0 (zero) in the vector of stratum sample sizes?

San
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