Try, ofr a factor:> x <-c("A","B","C") > x <- factor(x) > levels(x)[1] "A" "B" "C"> x <- factor(x,levels=levels(x)[c(3,2,1)]) > levels(x)[1] "C" "B" "A" Rock, DRF -- View this message in context: http://r.789695.n4.nabble.com/factor-tp879983p2224639.html Sent from the R help mailing list archive at Nabble.com.