Try this: aggregate(hobby ~ id + name, a, FUN = toString)
On Thu, Oct 7, 2010 at 12:52 PM, Tan, Richard <r...@panagora.com> wrote: > Hi, R function aggregate can only take summary stats functions, can I > aggregate text columns? For example, for the dataframe below, > > > > > a <- rbind(data.frame(id=1, name='Tom', > hobby='fishing'),data.frame(id=1, name='Tom', > hobby='reading'),data.frame(id=2, name='Mary', > hobby='reading'),data.frame(id=3, name='John', > hobby='boating'),data.frame(id=2, name='Mary', hobby='running')) > > > a > > id name hobby > > 1 1 Tom fishing > > 2 1 Tom reading > > 3 2 Mary reading > > 4 3 John boating > > 5 2 Mary running > > > > > > I want output as > > >b > > id name hobbies > > 1 Tom fishing reading > > 2 Mary reading running > > 3 John boating > > > > > > > > Thanks, > > Richard > > > > > [[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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[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.
