try your first "reproducible line" first :-)
On Thu, Jul 23, 2009 at 5:18 PM, Alexis Maluendas <avmaluend...@gmail.com>wrote: > Hi R experts, > > I need know how calculate a weighted mean by group in a data frame. I have > tried with aggragate() function: > > data.frame(x=c(15,12,3,10,10),g=c(1,1,1,2,2,3,3),w=c(2,3,1,5,5,2,5)) -> d > aggregate(d$x,by=list(d$g),weighted.mean,w=d$w) > > Generating the following error: > > Error en FUN(X[[1L]], ...) : 'x' and 'w' must have the same length > > Thanks in advance > > [[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<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.
