maybe: x = c(.2, .1, .8, .3, .7, .6, .01, .2, .5, 1, 1) breaks = seq(0, 1, .2) LETTERS[1:(length(breaks)-1)][cut(x, breaks)]
b On Jul 18, 2007, at 1:50 PM, Doran, Harold wrote: > Michael > > Assume your data frame is called "data" and your variable is called > "V1". Converting this to a factor is: > > data$V1 <- factor(data$V1) > > Creating the classes can be done using ifelse(). Something like > > data$class <- ifelse(data$V1 < .21, A, ifelse(data$V1 < .41, B, C)) > > Harold > > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Ing. >> Michal Kneifl, Ph.D. >> Sent: Wednesday, July 18, 2007 1:37 PM >> To: r-help@stat.math.ethz.ch >> Subject: [R] Classification >> >> Hi, >> I am also a quite new user of R and would like to ask you for help: >> I have a data frame where all columns are numeric variables. >> My aim is to convert one columnt in factors. >> Example: >> MD >> 0.2 >> 0.1 >> 0.8 >> 0.3 >> 0.7 >> 0.6 >> 0.01 >> 0.2 >> 0.5 >> 1 >> 1 >> >> >> I want to make classes: >> 0-0.2 A >> 0.21-0.4 B >> 0.41-0.6 C >> ..... and so on >> >> So after classification I wil get: >> MD >> A >> A >> D >> B >> . >> . >> . >> and so on >> >> Please could you give an advice to a newbie? >> Thanks a lot in advance.. >> >> Michael >> >> ______________________________________________ >> R-help@stat.math.ethz.ch 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. >> > > ______________________________________________ > R-help@stat.math.ethz.ch 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. ______________________________________________ R-help@stat.math.ethz.ch 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.