Henrique, Thanks for the rapid response. I tried the following to no avail:
> dat.lm <-lm(c~d, dat=dat, subset= d <0) Error in eval(expr, envir, enclos) : invalid 'envir' argument > dat.lm <-lm(c~d, dat=dat, subset= (d <0)) Error in eval(expr, envir, enclos) : invalid 'envir' argument > dat.lm <-lm(c~d, dat=dat, subset= c(d <0)) Error in eval(expr, envir, enclos) : invalid 'envir' argument Any other suggestions? Thanks, Michael Just On Sat, Oct 18, 2008 at 5:15 PM, Henrique Dallazuanna <[EMAIL PROTECTED]> wrote: > Try this: > > dat.lm <-lm(c~d, subset=d < 0) > > > On Sat, Oct 18, 2008 at 7:03 PM, Michael Just <[EMAIL PROTECTED]> wrote: >> 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? >> >> Thanks, >> Michael Just >> >> ______________________________________________ >> 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. >> > > > > -- > Henrique Dallazuanna > Curitiba-Paraná-Brasil > 25° 25' 40" S 49° 16' 22" O > ______________________________________________ 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.
