Dear R-helpers, I have a problem which I suppose is trivila, but... I have included NA values as factors ( (to be able to make nice printed summaries with NAs % ba category ) with the following code
dat$x.f<-factor(dat$x, exclude=NULL); levels(dat$x.f)<-c("A1","A2","A3","A4","NA"); length(dat$x.f) Now, I want to impute the missing values. Is there a nice way to drop the NA factor instead of rewriting something of the sort dat$x.f<-factor(dat$x); levels(dat$x.f)<-c("A1","A2","A3","A4"); length(dat$x.f)? Thanks Anne ---------------------------------------------------- Anne Piotet Tel: +41 79 359 83 32 (mobile) Email: [EMAIL PROTECTED] --------------------------------------------------- M-TD Modelling and Technology Development PSE-C CH-1015 Lausanne Switzerland Tel: +41 21 693 83 98 Fax: +41 21 646 41 33 -------------------------------------------------- [[alternative HTML version deleted]] ______________________________________________ [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