On Thu, Feb 25, 2010 at 5:39 PM, Carl Witthoft <c...@witthoft.com> wrote: > Well, here goes... > > I still wish there were a really good monograph on the use and > implementation of factors.
To get a good handle on factors, and the sets of contrasts they encode, it is really necessary to study a good statistics book. I recommend mine Statistical Analysis and Data Display, An Intermediate Course with Examples in S-Plus, R, and SAS, Richard M. Heiberger and Burt Holland, Springer 2004 But I will acknowledge that other books are available. Rich ______________________________________________ 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.
