Hi > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of jeharmse > Sent: Friday, March 08, 2013 7:41 PM > To: r-help@r-project.org > Subject: Re: [R] Re move row.names column in dataframe > > > ... the row.names will not interfere with any merging operation ... > > Row names do not interfere with merge, but they cause other problems. > In the example, I want to test whether rows have the same entries (in > some or all columns). identical fails because of the row names, and > all( == ) can fail if there are NAs. There are ways around this, but it > would be cleaner to be able to remove row names. > > > df <- data.frame(x=c(1,1,NA,NA), y=c(2,2,7,7)) > > identical(df[1,],df[2,]) > [1] FALSE > > all(df[1,]==df[2,]) > [1] TRUE > > all(df[3,]==df[4,]) > [1] NA
I beg your pardon, whot does row names do with the above result? What do you expect as a result of all(df[3,]==df[4,]) Regards Petr > > > > > -- > View this message in context: http://r.789695.n4.nabble.com/Remove-row- > names-column-in-dataframe-tp856647p4660743.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. ______________________________________________ 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.
