?by Bert Gunter Genentech Nonclinical Statistics
-----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of sjaffe Sent: Tuesday, February 02, 2010 1:16 PM To: r-help@r-project.org Subject: Re: [R] tapply for function taking of >1 argument? 'fraid not :-(( tapply( data, groups, weighted.mean, weights) won't work because the *entire* weights vector is passed as the 2nd arg to weighted.means. But weighted.mean needs 'weights' to be split in the same way as 'data' -- the first and 2nd args need to correspond. Jorge Ivan Velez wrote: > > Hi sjaffem, > > You were almost there: > > tapply( yourdata, groups, weighted.mean, weights) > > See ?tapply for more information. > > HTH, > Jorge > > > -- View this message in context: http://n4.nabble.com/tapply-for-function-taking-of-1-argument-tp1460392p1460 419.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. ______________________________________________ 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.
