try this: dfA$dups<-duplicated(dfA$Value) | duplicated(dfA$Value, fromLast = TRUE)
On Mon, Sep 10, 2012 at 2:23 PM, kborgmann <borgm...@email.arizona.edu> wrote: > Hi, > I am trying to identify duplicate values in a column in a date frame. The > duplicated function identifies the duplicate rows in the data frame but it > only does this for the second record, not both records. Is there a way to > mark both rows in the data frame as TRUE? > dfA$dups<-duplicated(dfA$Value) > dfA > Site State Value dups > 929 VA 73 FALSE > 929 VA 73 TRUE > 930 VA 76 FALSE > 930 VA 76 TRUE > 931 VA 74 FALSE > 932 VA 75 FALSE > > But I would like this > Site State Value dups > 929 VA 73 TRUE > 929 VA 73 TRUE > 930 VA 76 TRUE > 930 VA 76 TRUE > 931 VA 74 FALSE > 932 VA 75 FALSE > > Thank you for your replies! > Still on the learning curve, > Kathi > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/Identifying-duplicate-rows-tp4642679.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. -- Jim Holtman Data Munger Guru What is the problem that you are trying to solve? Tell me what you want to do, not how you want to do it. ______________________________________________ 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.
