Oops! I forgot the obligatory OS and session info:
> sessionInfo() R version 2.8.1 (2008-12-22) i386-pc-mingw32 locale: LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 attached base packages: [1] splines stats graphics grDevices utils datasets methods base other attached packages: [1] mh1823AECL_2.5.4 survival_2.35-3 RColorBrewer_1.0-2 RODBC_1.2-5 rcom_2.1-1 [6] rscproxy_1.2-0 > Charles Annis, P.E. <mailto:charles.an...@statisticalengineering.com> charles.an...@statisticalengineering.com phone: 561-352-9699 eFax: 614-455-3265 <http://www.StatisticalEngineering.com> http://www.StatisticalEngineering.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.