> On Apr 19, 2016, at 11:23 PM, g.maub...@weinwolf.de wrote: > > Hi All, > > I would like to match some datasets. Both deliver variables AND cases > which might or might not be present in all datasets: > > This sequence > > Kunden <- Kunden_2011 > Kunden <- merge(Kunden, Kunden_2012, > by.x = "Debitor", by.y = "Debitor") > > Kunden <- merge(Kunden, Kunden_2013, > by.x = "Debitor", by.y = "Debitor") > > Kunden <- merge(Kunden, Kunden_2014, > by.x = "Debitor", by.y = "Debitor") > > Kunden <- merge(Kunden, Kunden_2015, > by.x = "Debitor", by.y = "Debitor") > > delivers too few cases. So I guess it does an equi-join.
You should not be guessing. Read the help page. It calls the default setting a natural join. > > How can I join the datasets and keep the variables as well as the cases? > If you want a full outer join use all=TRUE. This, too, should have been in the ?merge help page. > I am looking forward to your reply. > > Kind regards > > Georg > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
