Dear John ?ordered
will help you. Regards, Christoph Buser -------------------------------------------------------------- Christoph Buser <[EMAIL PROTECTED]> Seminar fuer Statistik, LEO C13 ETH Zurich 8092 Zurich SWITZERLAND phone: x-41-44-632-4673 fax: 632-1228 http://stat.ethz.ch/~buser/ -------------------------------------------------------------- John Vokey writes: > useRs, > A no doubt simple question, but I am baffled. Indeed, I think I > once knew the answer, but can't recover it. The default contrasts > for aov (and lm, and...) are contr.treatment and contr.poly for > unordered and ordered factors, respectively. But, how does one > invoke the latter? That is, in a data.frame, how does one indicate > that a factor is an *ordered* factor such that contr.poly is invoked > in the aov or lm call? > -- > Please avoid sending me Word or PowerPoint attachments. > See <http://www.gnu.org/philosophy/no-word-attachments.html> > > -Dr. John R. Vokey > > ______________________________________________ > [email protected] 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. ______________________________________________ [email protected] 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.
