On Sep 23, 2015, at 10:09 AM, raoman ramirez wrote: > well i have info<-read.csv(file, header=T) > and i want try thatmodel<-lm(info[1]~info[2]) > is for metod backward selection but i don't know how Can you explain why you want to apply backward selection to a model with a single predictor vector? -- David Winsemius Alameda, CA, USA