[R] Difference in ANOVA results - R vs. JMP/Minitab
andy_liaw at merck.com
Thu Nov 20 22:56:12 CET 2003
> From: Nirmal Govind [mailto:nirmalg at psu.edu]
> Thanks for your reply, Prof. Ripley.
> > And all of that is explained in the reference on the aov help page.
> > Please do stop speculating and start reading.
> Well, the reason for speculation was cos I couldn't find any
> details on
> that help page... thanks for letting me know that the
> reference explains
> > AoV has nothing to do with coefficients. There is
> dummy.coef to get
> > uncoded coefficients, and there is options(contrasts=) to set the
> > coding.
> Ok, I will try these...
> > Yes, you should read a lot more. Chapter 6 of Venables & Ripley
> > (2002)
> > and chapter 5 of Chambers & Hastie (1991) would be a good start.
> Oh, I most definitely should! :-) .. I guess I was hoping that such
> details would be included in the help page for the function
> or mentioned
> in some R introduction or tutorial or so on the Documentation page..
> looks like that's not the case so I'll get a hold of the
> books above...
It's unreasonable to expect stat software documentation to also serve as
textbooks or reference books. What you have not learned in a course can not
be made up just by reading help pages. That's not the purpose of help
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