Try this: DF V1 V2 V3 1 a w 200 2 a w 100 3 b w 500 4 b w 200 5 b z 300 6 b z 400
DF$rank <- unlist(lapply(split(DF$V3, list(DF$V1, DF$V2), drop = T), rank)) On Fri, Sep 26, 2008 at 5:54 PM, Matthew Pettis <[EMAIL PROTECTED]> wrote: > Hi, > > I'd like to rank obs in a data frame as subset by 2 or more columns... > The example input would look like the following: > > ====+====+====+====+ > x y v > -- -- -- > a w 200 > a w 100 > b w 500 > b w 200 > b z 300 > b z 400 > ====+====+====+====+ > > And the data frame I want to create is below: > ====+====+====+====+ > x y v rank > -- -- -- ---- > a w 200 1 > a w 100 2 > b w 500 1 > b w 200 2 > b z 300 2 > b z 400 1 > ====+====+====+====+ > > Can someone help me with this? > > Thanks, > Matt > -- > It is from the wellspring of our despair and the places that we are > broken that we come to repair the world. > -- Murray Waas > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ 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.
