You can use nchar() to get the length of the string, and use that in substring:
mynum <- as.character(15.6) > substring(mynum, nchar(mynum)-2, nchar(mynum)) [1] "5.6" On Sun, Dec 4, 2011 at 8:38 AM, Kang Min <ngokang...@gmail.com> wrote: > Hi all, > > I have a numeric vector with 1 decimal place, and I'd like to extract > the last 3 characters, including the decimal point. The vector ranges > from 0 to 20. > > x <- round(runif(100)*20, digits=1) > > Some of numbers have 3 characters, and some have 4. I've read up on > the substr() function but that extracts characters based on exact > positions. How can I extract just the last 3 characters no matter the > length of the number? e.g. from 16.7 I want 6.7, from 3.5 I want 3.5 > as it is. > > Thanks, > Kang Min > -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.
