Hi Dimitri, The factor() function allows you to specify the levels. So small.frame$myfactor <- factor(small.frame$myfactor, levels = levels(large.frame$myfactor))
should do it. Best, Ista On Thu, Apr 7, 2011 at 11:47 AM, Dimitri Liakhovitski <dimitri.liakhovit...@gmail.com> wrote: > Hello! > > I have larger and a smaller data frame with 1 factor in each - it's > the same factor: > > large.frame<-data.frame(myfactor=LETTERS[1:10]) > small.frame<-data.frame(myfactor=LETTERS[c(9,7,5,3,1)]) > levels(large.frame$myfactor) > levels(small.frame$myfactor) > table(large.frame$myfactor) > table(small.frame$myfactor) > > myfactor has 10 levels in large.frame and 5 levels in small.frame. All > 5 levels in small.frame are present in large.frame. > How could I make levels(small.frame$myfactor) contain all the same > levels as levels(large.frame$myfactor)? > In other words, I want table(small.frame$myfactor) to have the same > number of entries as table(small.frame$myfactor) but with 5 zeros in > it: > A B C D E F G J I J > 1 0 1 0 1 0 1 0 1 0 > > Thank you very much for your suggestions! > -- > Dimitri Liakhovitski > Ninah Consulting > www.ninah.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. > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.org ______________________________________________ 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.
