It means that dat$v1, dat$v2, . . . are not columns in the data frame df Specify the formula as v1 ~ v2+v2+v3+v4+v5+factor Then (assuming that factor is a column object of the right length) you should be fine.
John Maindonald email: john.maindon...@anu.edu.au phone : +61 2 (6125)3473 fax : +61 2(6125)5549 Centre for Mathematics & Its Applications, Room 1194, John Dedman Mathematical Sciences Building (Building 27) Australian National University, Canberra ACT 0200. http://www.maths.anu.edu.au/~johnm > From: agent dunham <crossp...@hotmail.com> > Date: 9 March 2011 3:47:10 AM AEDT > To: r-help@r-project.org > Subject: Re: [R] cv.lm syntax error > > > Thanks for your answer, but I type the following: > >> dfmod.1 <- data.frame(dat$v1,dat$v2,dat$v3,dat$v4, dat$v5,factor) > >> CVlm(df= dfmod.1, form.lm = formula(dat$v1 ~ dat$v2+dat$v3+ dat$v4+ >> dat$v5+ factor), m=3, seed=29, plotit=TRUE, printit =TRUE) > > Error en `[.data.frame`(df, , ynam) : undefined columns selected > > What does it mean? > > u...@host.com > > -- > View this message in context: > http://r.789695.n4.nabble.com/cv-lm-syntax-error-tp3334889p3341767.html > Sent from the R help mailing list archive at Nabble.com. [[alternative HTML version deleted]] ______________________________________________ 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.
