?merge may be what you are looking for. If not, you should clarify what you want to do. --------------------------------------------------------------------------- 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.
Jie TANG <totang...@gmail.com> wrote: hi , Now I have two dataset and want to compare them with same sample. Dataset A: year mon day obs 2010 03 12 12 2010 03 18 22 2010 04 12 62 2010 07 24 29 Dataset B: year mon day obs 2010 03 12 15 2010 04 12 57 2010 07 24 32 2010 08 23 15 As you see,dataset A and B have several observation data but their obs data is not same everyday. Now I want to compare the data from two dataset in the same time. How could I write the R script? errdata<-subset(A,A$V11==Bdata$V11 & A$V12==B$V12) this command seems failed.How could I? -- [[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. [[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.