I've had a little experience using the package, Amelia. Are you sure that your nominal variables - race, south, etc - are in your ad04 data frame ?
David Freedman -- View this message in context: http://r.789695.n4.nabble.com/Amelia-error-tp4568455p4568600.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.
