You might want to check out the plyr package. Hadley On Fri, Oct 1, 2010 at 6:05 AM, Werner W. <pensterfuz...@yahoo.de> wrote: > Hi, > > I was wondering if there is an easy way to accomplish the following in R: > Often I want to apply a function, e.g. weighted.quantile from the Hmisc > package > to grouped subsets of a data.frame (grouping variable) but then I also need to > hand over the weights which seems not possible with summaryBy or aggregate or > the like. > > Is there a function to do this? Currently I do this with loops but it is very > slow. > > I would be very grateful for any hints. > > Thanks, > Werner > > > > > ______________________________________________ > 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. >
-- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.
