On Thu, Jan 21, 2010 at 2:16 PM, Dennis Murphy <djmu...@gmail.com> wrote: > Hi: > > This paper was a prelude to his first book 'Exact Statistical Methods for > Data Analysis'. > He uses what is called a generalized p-value approach to inference, and for > the > book he wrote commercial software. AFAIK, no R package implements his > methodology. The 'conventional' approach to unequal variance in ANOVA is > to use generalized least squares, whose implementation is found in gls() in > the nlme package.
There are quite a few references on ?gls. Which one is the most introductory material that I should start with, if I want to understand the method? Do you have any simple explanation that may help me understand what is the difference between the method in 'Exact Statistical Methods for Data Analysis' and the method in gls()? > HTH, > Dennis > > On Thu, Jan 21, 2010 at 12:03 PM, Peng Yu <pengyu...@gmail.com> wrote: >> >> I found this paper on ANOVA on unequal error variance. Has this be >> incorporated to any R package? Is there any textbook that discuss the >> problem of ANOVA on unequal error variance in general? >> >> http://www.jstor.org/stable/2532947?cookieSet=1 >> >> ______________________________________________ >> 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. > > ______________________________________________ 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.
