this is what i needed! thank you. > -----Original Message----- > From: Jorge Ivan Velez [mailto:jorgeivanve...@gmail.com] > Sent: Monday, April 13, 2009 12:50 PM > To: Dan Dube > Cc: r-help@r-project.org > Subject: Re: [R] tapply output as a dataframe > > > Dear Dan, > > Try this: > > do.call(rbind,a) > > > HTH, > > Jorge > > > > On Mon, Apr 13, 2009 at 12:41 PM, Dan Dube <dd...@advisen.com> wrote: > > > i use tapply and by often, but i always end up banging > my head against > the wall with the output. > > is there a simpler way to convert the output of the > following tapply to > a dataframe or matrix than what i have here: > > # setup data for tapply > dt = data.frame(bucket=rep(1:4,25),val=rnorm(100)) > fn = function(x) { > ret = > > c(unname(quantile(x,probs=seq(.25,.75,.25),na.rm=T)),mean(x,na.rm=T)) > } > a = tapply(dt$val,dt$bucket,fn) > > # i seem to be doing way more work than i should here.... > n = names(a) > mat = NULL > for (i in 1:length(n)) { > mat = rbind(mat,unname(unlist(a[i]))) > } > row.names(mat) = n > > thank you! > > ______________________________________________ > 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.
