Dear Steve, Try
? intersect and see if that might help. Cheers, Umesh On Tue, Apr 28, 2009 at 1:29 PM, Steve Murray <smurray...@hotmail.com>wrote: > > Dear all, > > I have 2 data frames, both with 14 columns of data and differing numbers of > rows. The first two columns are 'Latitude' and 'Longitude'. I want to find > the pairs of Latitude and Longitude coordinates which are common to both > datasets, and output a new data frame which is composed of these coincident > rows. I tried using the 'unique' command, but had difficulties interpreting > the help file. > > Many thanks for any help offered, > > Steve > > ______________________________________________ > 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.
