Read ?merge --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity.
justin jarvis <littledude.jar...@gmail.com> wrote: >Hello all, >I'm almost embarrassed to post this , it seems so easy. Suppose I have >a >baseline and follow up survey but some people are missing in the follow >up: > >> baseline<-data.frame(id=c(3,5,7,9,12), data= runif(5)) >> follow.up<-data.frame(id=c(3,7,9,12), data= runif(4)) >> baseline > id data >1 3 0.66771988 >2 5 0.28794744 >3 7 0.01892821 >4 9 0.64863175 >5 12 0.86485882 >> follow.up > id data >1 3 0.8237210 >2 7 0.8140544 >3 9 0.8803674 >4 12 0.8031520 > >Here, in follow up we are missing person #5. I need to delete him from >the >baseline, so that I have an equal number of rows once again. Obviously > >baseline<-baseline[-2,] won't cut it here, since in my data set I have >thousands of people. > >Thanks in advance > >Justin > > [[alternative HTML version deleted]] > >______________________________________________ >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. ______________________________________________ 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.