Antonio Olinto <[EMAIL PROTECTED]> writes: > Dear Harold, thanks for your answer. > > The problem is that the levels of the factor are shown not only in the > summary, > but also when I make an interaction plot. > > Is it possible to create a new subset without the reference to the levels > that I > will not use?
Just remove the levels from the factor where you don't want them: > x1 <- dtp[dtp==0] > x1 [1] 0 0 0 0 Levels: 0 1 > x1[drop=T] [1] 0 0 0 0 Levels: 0 -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
