On Sun, Nov 8, 2009 at 11:59 AM, Peng Yu <pengyu...@gmail.com> wrote: > On Sun, Nov 8, 2009 at 10:11 AM, Duncan Murdoch <murd...@stats.uwo.ca> wrote: >> On 08/11/2009 11:03 AM, Peng Yu wrote: >>> >>> I'm wondering which textbook discussed the various contrast matrices >>> mentioned in the help page of 'contr.helmert'. Could somebody let me >>> know? >> >> Doesn't the reference on that page discuss them? > > It does explain what the functions are. But I need a more basic and > complete reference. For example, I want to understand what 'Helmert > parametrization' (on page 33 of 'Statistical Models in S') is. >
Just google for: Helmert contrasts ______________________________________________ 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.
