I knew it was simple. Thanks very much. -tom
jim holtman <[EMAIL PROTECTED]> wrote: > ?table to count the factors > > > x > [1] "a" "b" "c" "d" "e" > > paste(head(x, -1), tail(x, -1), sep='') > [1] "ab" "bc" "cd" "de" > > > On 10/15/07, Tom Sgouros <[EMAIL PROTECTED]> wrote: > > > > Hi All: > > > > I feel like there must be a slick R-native no-loop way to get the counts > > for the entries in a factor, but I'm unable to see how. Right now I'm > > doing this: > > > > hn.ent<-data.frame(rep(0,length(levels(hnf))), row.names=levels(hnf)) > > colnames(hn.ent)<-c("count") > > for (lev in levels(hnf)) { > > hn.ent[lev,"count"] <- sum(lev == hnf) > > } > > > > I'm sure there's a better way, but I don't know it. Can anyone help? > > > > Also, why does hn.ent[lev,"count"] work and hn.ent$count[lev] does not? > > > > In a related problem, I have a vector of strings, and want a vector of > > the strings combined. That is, I have c("a", "b", "c", "d") and I want > > c("ab", "bc", "cd"). I see this is easy with numbers, but paste() is > > the only way I see to stick strings together, and I don't get how I'd > > use them without a loop. > > > > Many thanks, > > > > -tom > > > > -- > > ------------------------ > > tomfool at as220 dot org > > http://sgouros.com > > http://whatcheer.net > > > > ______________________________________________ > > 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. > > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem you are trying to solve? > -- ------------------------ tomfool at as220 dot org http://sgouros.com http://whatcheer.net ______________________________________________ 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.