Thank you for providing a reproducible example. I tweaked it a little bit to make it actually a data frame problem.
There are lots of ways to do this; here's one approach. On second thought, this looks a lot like homework, so perhaps instead I'll just suggest using subset() with more than one condition. Sarah On Mon, Dec 9, 2013 at 3:27 PM, Andras Farkas <motyoc...@yahoo.com> wrote: > Dear All > > please help with the following: > > I have: > > a <-seq(0,10,by=1) > b <-c(10:20) > d <-cbind(a,b) > f <-16 > > I would like to select the value in column a based on a value in column b, > where the value in column b is the 1st value that is smaller then f. Thus I > should end up with the number 5 because the 1st value that is below 16 would > be 15, and in the same row column a has the number 5.... > > appreciate your insights, > > andras -- 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.
