Johannes, Thanks for the response. However, ... > dat.neg <- dat[dat$d < 0, ] Error in dat[dat$d < 0, ] : incorrect number of dimensions In addition: Warning message: $ operator is deprecated for atomic vectors, returning NULL in: dat$d
Any other ideas? Thanks, Michael On Sat, Oct 18, 2008 at 5:18 PM, Johannes Hüsing <[EMAIL PROTECTED]> wrote: > > Am 18.10.2008 um 23:03 schrieb Michael Just: > >> Hello, >> I was wondering if there was a way to only select cases my from data >> frame that contained a negative value? >> >>> c<-c(1,2,3,4,5,6,7,8,9,10) >>> d<- c(-1,2,-3,-4,5,6,-7,8,-9,10) >>> f <- cbind(c,d) >>> dat <-data.frame(f) >>> dat.lm <-lm(c~d) >> >> If I wanted to only use the rows that had a negative value in column d >> for my regression, how could I make that selection? >> >> > > untested: > dat[dat$d < 0, ] > > ______________________________________________ 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.
