[R] how to create data.frames from vectors with duplicates
pdalgd at gmail.com
Thu Sep 8 13:09:12 CEST 2011
On Sep 8, 2011, at 03:18 , zhenjiang xu wrote:
> Thanks for all your replies. I am using rowsum() and it looks efficient. I
> hope I could do some benchmark sometime in near future and let people know.
> Or is there any benchmark result available?
I'm a bit surprised that no-one thought of xtabs(x ~ y)
It won't win the speed competition, though.
Peter Dalgaard, Professor
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com
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