R equivalent of join between two data frames
Erin, I believe you can. See the help for merge, in particular the all.x and all.y parameters. Cheers, F. Markham
On 1 November 2011 18:03, Hodgess, Erin <HodgessE at uhd.edu> wrote:
Hi! I'd like to remove the non-matching rows, if possible. ?I don't think you can do that with merge. Thanks, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse at uhd.edu -----Original Message----- From: r-sig-geo-bounces at r-project.org on behalf of Dan Putler Sent: Tue 11/1/2011 1:59 AM To: r-sig-geo at r-project.org Subject: Re: [R-sig-Geo] R equivalent of join between two data frames Hi Erin, Is the "merge" function appropriate? If you are joining a non-spatial data frame to a spatial data frame object (e.g., a SpatialPointsDataFrame) it should work. Dan On 10/31/2011 11:33 PM, Hodgess, Erin wrote:
Dear R Sig Geo People: Is there an equivalent of "join" from ArcGIS 10 in R, please? I've been experimenting with "match" but the results between the two are not the same. thanks, Sincerely, Erin Erin M. Hodgess, PhD Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: hodgesse at uhd.edu ? ? ? [[alternative HTML version deleted]]
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