
I could suggest merge(merge(data1,data2), data3). 
 
However, one problem I notice is that is assigns age=12 and gender=M to everyone with id=1, and so on.
 
How are we to know that person with id=1 in data1 is the same person with id=1 in data2 and data3? 
Bill> Date: Wed, 4 Jun 2008 16:24:04 -0700> From: kjaja27@yahoo.com> To: r-help@r-project.org> Subject: [R] merging 3 data sets at once> > > Hi All,> > I am looking into merging 3 data sets I know how to do that by merging data1> with data2 and then merging the result with data 3. I was wondering if it> can be done all at once so I tried,> > M<-merge(data1,data2,data3, by=”ID”)> > It does not work!> Any ideas?> > > > -- > View this message in context: http://www.nabble.com/merging-3-data-sets-at-once-tp17658873p17658873.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.
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