Thanks Peter & Petr, It was indeed an issue of having some character variables in there. Now it works just fine.
Cheers, Luca Il giorno 30/ago/2011, alle ore 10.15, peter dalgaard ha scritto: > > On Aug 30, 2011, at 10:04 , Luca Meyer wrote: > >> Hi, >> >> Does anyone know how to show zero frequencies variable levels with the xtabs >> command? They show with the table(x,y) command but I need to apply weight to >> frequency tables and I also need to cbind several tables together, which >> implies that they all need to show the same number of rows. > > Are you sure you are doing the same thing as with table(). I'd expect it to > work if you ensure that the variables are factors: > >> library(ISwR) >> xtabs(~sex+menarche,data=juul) > menarche > sex 1 2 > 2 369 335 > >> juul$sex <- factor(juul$sex,levels=1:2) >> xtabs(~sex+menarche,data=juul) > menarche > sex 1 2 > 1 0 0 > 2 369 335 > > > >> >> Alternatively, do you know how to column bind tables with different number >> of rows? I cannot use merge as it requires daata.frame and that modifies the >> look of the banner table I am trying to create... >> >> Thanks, >> Luca >> >> >> Mr. Luca Meyer >> www.lucameyer.com >> R version 2.13.1 (2011-07-08) >> Mac OS X 10.6.8 >> >> >> >> >> >> >> >> [[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. > > -- > Peter Dalgaard, Professor > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Email: pd....@cbs.dk Priv: pda...@gmail.com > ______________________________________________ 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.
