[R] Anova unequal variance

[Peng Yu]

On Thu, Jan 21, 2010 at 2:16 PM, Dennis Murphy <djmuser at 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.ut at 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
>>
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>
>