It seems the var names you've put are not the same as in the design object:
"all variables must be in design= argument ": that means the object you've assigned in mydesign <- svydesign(ids=~vill_neigh_code+clust, strata=~strat, weights=~sweight, data=mydata) Check the spelling. Note that the "mydesign" is *not* a dataframe. That means that mydesign[,5] or mydesign$myvar won't work (off course neither will naming the original dataframe "mydata"), you must just use the variable names alone for instance: svyglm(api00~ell+meals+mobility, design=dstrat) is correct, using only the var names, not dstrat[smth]~dstrat[smth] If you write the names correctly it should work [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.