Perfect. Thanks Hadley!
> -----Original Message----- > From: hadley wickham [mailto:[EMAIL PROTECTED] > Sent: Sunday, September 09, 2007 10:11 AM > To: Muenchen, Robert A (Bob) > Cc: r-help@stat.math.ethz.ch > Subject: Re: [R] stacking data frames with different variables > > Have a look at rbind.fill in the reshape package. > > Hadley > > On 9/9/07, Muenchen, Robert A (Bob) <[EMAIL PROTECTED]> wrote: > > Hi All, > > > > If I need to stack two data frames, I can use rbind, but it requires > > that all variables exist in both sets. I can make that happen, but > other > > stat packages would figure out where the differences were, add the > > missing variables to each, set their values to missing and stack > them. > > Is there a more automatic way to do that in R? > > > > Below is an example program. > > > > Thanks, > > Bob > > > > # Top data frame has two variables. > > x <- c(1,2) > > y <- c(1,2) > > > > top <- data.frame(x,y) > > top > > > > # Bottom data frame has only one of them. > > x <- c(3,4) > > bottom <- data.frame(x) > > bottom > > > > # So rbind won't work. > > rbind(top, bottom) > > > > # After figuring out where the mismatches are I can > > # make the two DFs the same manually. > > bottom <- data.frame( bottom, y=NA) > > bottom > > > > # Now I get the desired result. > > both <- rbind(top,bottom) > > both > > > > ========================================================= > > Bob Muenchen (pronounced Min'-chen), Manager > > Statistical Consulting Center > > U of TN Office of Information Technology > > 200 Stokely Management Center, Knoxville, TN 37996-0520 > > Voice: (865) 974-5230 > > FAX: (865) 974-4810 > > Email: [EMAIL PROTECTED] > > Web: http://oit.utk.edu/scc, > > News: http://listserv.utk.edu/archives/statnews.html > > > > ______________________________________________ > > R-help@stat.math.ethz.ch 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. > > > > > -- > http://had.co.nz/ ______________________________________________ R-help@stat.math.ethz.ch 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.