Seeing 'plot.Predict' makes me think you are using the Gls function in the rms package. If so, you are not reading the package's documentation. Also please follow the posting guide. Frank
----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/GLS-95-CI-tp3163217p3163263.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.