That worked. Many thanks, Thomas. -Bobby --- Thomas Lumley <[EMAIL PROTECTED]> wrote:
> On Sun, 4 Sep 2005, A Das wrote: > > > Just: "missing values in object". That would imply > the > > object was created. But then I write "dchina", and > it > > says "object dchina not found". > > No, it would not imply the object was created. If > it was an error message > (rather than a warning) the object would not have > been created. > > I presume the full message was > Error in na.fail.default(object) : missing values > in object > > If so, it sounds as though you have missing values > in the id, weights, or > strata variable. > summary(China[,c("psu","stata","weight0x"]) > will verify this. > > Stata will just have dropped these observations (use > -svydes- to verify > this). If you want to drop the observations in R > you need to do this > explicitly. Having missing data may be unavoidable, > but if you have > observations in a sample it seems that you should > know how they were > sampled. > To drop these observations you could use > > obsChina <- subset(China, !is.na(psu) & > !is.na(strata) & !is.na(weight0x)) > > and then use obsChina rather than China in the > svydesign() function. > > -thomas > > > > > -Bobby > > > > --- Thomas Lumley <[EMAIL PROTECTED]> > wrote: > > > >> On Sun, 4 Sep 2005, A Das wrote: > >> > >>> Thanks, Thomas. > >>> Yes, that's exactly what happened: the > warnings > >>> came first after "data(China)", and then after > >>> "dchina<-svydesign..." So the design object > isn't > >>> being produced? The dataset is very large, and > the > >>> weights were already set in Stata before > >> importing. > >>> Would either of those cause problems? > >> > >> Probably not. What was the error message from > >> svydesign()? That is what > >> will say what went wrong. > >> > >> -thomas > >> > > > > > > > > > > > ____________________________________________________ > > Start your day with Yahoo! - make it your home > page > > http://www.yahoo.com/r/hs > > > > > > Thomas Lumley Assoc. Professor, Biostatistics > [EMAIL PROTECTED] University of Washington, > Seattle > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html