[R] Type III sum of square in ANOVA

Rolf Turner r.turner at auckland.ac.nz
Tue Dec 15 20:37:37 CET 2009


On 16/12/2009, at 8:19 AM, ram basnet wrote:

> Dear all,
>
> Does some body have idea on how to extract Type III sum of Square  
> from "lm" or "aov" function in R ? I could not figure out it.
>
> If this is minor and irrelevant to post in this mail, I am sorry  
> for that.

(1) Read Bill Venables' Exegeses on Linear Models, http:// 
www.stats.ox.ac.uk/pub/MASS3/Exegeses.pdf

(He overstates the case a tiny bit, but only a *tiny* bit! :-) )

(2) I believe John Fox's ``car'' package (from CRAN) makes so-called  
Type III sums of squares
available, if you insist on having them.

	cheers,

		Rolf Turner

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