On Tue, May 19, 2015 at 1:23 PM, michael westphal via R-help <r-help@r-project.org> wrote:
You can't compare them (statistically -- you can of course draw pictures). Note, from ?rlm: " Note that the df.residual component is deliberately set to NA to avoid inappropriate estimation of the residual scale from the residual mean square by "lm" methods. " Further questions should probably go to a statistics list like stats.stackexchange.com, as statistical questions are generally offtopic here. Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
