Hi sjaffem, You were almost there:
tapply( yourdata, groups, weighted.mean, weights) See ?tapply for more information. HTH, Jorge On Tue, Feb 2, 2010 at 3:58 PM, sjaffe <> wrote: > > I'm sure I can put this together from the various 'apply's and split, but I > wonder if anyone has a quick incantation: > > E.g. I can do tapply( data, groups, mean) > > but how can I do something like: tapply( list(data,weights), groups, > weighted.mean ) ? > > (or: mapply is to sapply as ? is to tapply ) > > Thanks for your help. > -- > View this message in context: > http://n4.nabble.com/tapply-for-function-taking-of-1-argument-tp1460392p1460392.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. > [[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.
