running my.df$my.var <- factor(my.df$my.var) seems to do the job
P.J. On Sat, 8 Dec 2007, Milton Cezar Ribeiro wrote: > Dear all, > > I have a data.frame with a factor collumn with about 10 levels. > After extract a subset of this data.frame, by selecting 2 of my 10 levels, > the new data.frame continue with original number of levels. How can I adjust > it in a manner that when I try levels(my.df) I receive the actualyzed number > of levels? > > By the way, I read my file using reab.table. > > I tryed solve it with : levels(my.df$my.var)<-unique(my.df$my.var) but the > problem remain. > > Many thanks, > > miltinho > Brazil > > > > para armazenamento! > > [[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. > Paulo Justiniano Ribeiro Jr LEG (Laboratorio de Estatistica e Geoinformacao) Universidade Federal do Parana Caixa Postal 19.081 CEP 81.531-990 Curitiba, PR - Brasil Tel: (+55) 41 3361 3573 Fax: (+55) 41 3361 3141 e-mail: paulojus AT ufpr br http://www.leg.ufpr.br/~paulojus ------------------------------------------------------------------------- 53a Reuniao Anual da Regiao Brasileira da Soc. Internacional de Biometria 14 a 16/05/2008, UFLA, Lavras,MG http://www.centenario.ufla.br/ ______________________________________________ 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.
