Ivan Calandra <ivan.calandra <at> uni-hamburg.de> writes: > > Hi, > > I knew about that way already, with factor(). Isn't there another > possibility, directly at the subsetting step? That would be of great help > iris1 <- iris[iris$Species == 'setosa',] ## I mean here > > Ivan
Not as far as I know. See gdata::drop.levels , or droplevels() in R 2.12.0. ______________________________________________ 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.
