-----Original Message-----
From: Vikas Rawal [mailto:vikas at mail.jnu.ac.in]
Sent: quinta-feira, 4 de Setembro de 2008 1:28
To: pecardoso at netcabo.pt
Subject: Re: [R] how to match or merge data.frames in this case...
I'm trying to match two data frames in order to replace the boundary
in a dataframe.1 with values in dataframe.2 ONLY where the pair id1
matches between the two data frames.
merge(dataframe.1,dataframe.2,by=c("id1","id2"))->mergeddata
Vikas
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