Heinz Tuechler <tuechler <at> gmx.at> writes: > > to drop unused factor levels two ways are outlined in R-help. In both > cases a label attribute is lost.
Brian Ripley has posted this http://markmail.org/message/pl2odydwzv64v3u3 Dieter ______________________________________________ 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.
