Hi > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Tvandenberg > Sent: Friday, September 07, 2012 1:05 PM > To: r-help@r-project.org > Subject: [R] error: in catg (xi, name=nam, label=lab): "LO2" has <2 > category levels > > Dear R-users, > > During a fit procedure in a Logistic prediction model I encounter the > following problem: > > error: in catg (xi, name=nam, label=lab: X has <2 category levels
I do not know lrm but the error seems to be explaining itself, some variable has only one level and shall have 2 sapply(sapply(dat, unique), length) shall give you for used variables value 2 or more. Regards Petr > > The following code is used: > > fit <-lrm(MRI_Diag_RC ~ factor(O4_1r) + N6_1r + leeftijd + LO1 + LO2 + > LO3+ > LO4+ LO5+ LO6+ LO7+ LO8+ LO9+ LO10+ LO11+ LO12+ LO13 + LO14+ LO15+ > LO16+ > LO17+ LO18+ LO19+ LO20+ LO21+ LO22+ LO23+ LO24 + LO26+ LO27 + LO29, > LO17+ LO18+ LO19+ LO20+ LO21+ LO22+ LO23+ model=T, > x=T, y=T, data=dat) > > Most predictors are (dichotomous) nominal variables as is the > problematic "LO2". Does anyone know what the problem is and how I can > correct it? > > Kind regards, > > Tobias > > > > -- > View this message in context: http://r.789695.n4.nabble.com/error-in- > catg-xi-name-nam-label-lab-LO2-has-2-category-levels-tp4642495.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. ______________________________________________ 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.
