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.
