Maithula: On Sun, Dec 26, 2010 at 11:09 AM, Maithula Chandrashekhar <m.chandrashekhar1...@gmail.com> wrote: > I am not a pure Statistics background and therefore please forgive me if > this question (which is not R related either) is too trivial. > > In many Statistics literature I find following statement: "restrictions in > different coefficients matrices have to be imposed to ensure uniqueness of > the parametrization". Can somebody tell me what is the meaning of Uniqueness > in the parametrization? Does it mean that, two different coefficient > matrices may give exactly the same result, and therefore coefficient matrix > is not unique? -- yes.
See the section on "contrast matrices" in Venables and Ripley's "Modern Applied Statistics with S" (MASS) for a concise but, I think, illuminating explanation. (It's in the chapter on linear models/regression). -- Bert > > I find there are many members (perhaps all) in this forum who are really > masters in Statistics. Therefore I hope somebody will clarify me with the > intuition behind that. > > Thanks, > > [[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. > -- Bert Gunter Genentech Nonclinical Biostatistics 467-7374 http://devo.gene.com/groups/devo/depts/ncb/home.shtml ______________________________________________ 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.
