gt; sensible Type-III tests, however.
>
> I hope this helps,
> John
>
>
> John Fox
> Department of Sociology
> McMaster University
> Hamilton, Ontario
> Canada L8S 4M4
> 905-525-9140x23604
> http://socserv.mcmaster.ca/jfox
> ---
I cannot resist a very brief entry into this old and seemingly
immortal issue, but I will be very brief, I promise!
Amasco Miralisus suggests:
> As I understood form R FAQ, there is disagreement among Statisticians
> which SS to use
>
(http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-does-the-out
2:21 PM
> To: r-help@stat.math.ethz.ch
> Cc: John Fox; Prof Brian Ripley; Mark Lyman
> Subject: Re: [R] Type II and III sum of square in Anova (R,
> car package)
>
> Hello,
>
> First of all, I would like to thank everybody who answered my
> question. Every post has added
I hope this helps,
> John
>
>
> John Fox
> Department of Sociology
> McMaster University
> Hamilton, Ontario
> Canada L8S 4M4
> 905-525-9140x23604
> http://socserv.mcmaster.ca/jfox
>
>
> > --
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Amasco
> Miralisus
> Sent: Saturday, August 26, 2006 5:07 PM
> To: r-help@stat.math.ethz.ch
> Subject: [R] Type II and III sum of square in Anova (R, car package)
>
I think this starts from the position of a batch-oriented package.
In R you can refit models with update(), add1() and drop1(), and
experienced S/R users almost never use ANOVA tables for unbalanced
designs. Rather than fit a pre-specified set of sub-models, why not fit
those sub-models that ap
> 1. First of all, more general question. Standard anova() function for lm()
> or aov() models in R implements Type I sum of squares (sequential), which
> is not well suited for unbalanced ANOVA. Therefore it is better to use
> Anova() function from car package, which was programmed by John Fox to
Hello everybody,
I have some questions on ANOVA in general and on ANOVA in R particularly.
I am not Statistician, therefore I would be very appreciated if you answer
it in a simple way.
1. First of all, more general question. Standard anova() function for lm()
or aov() models in R implements Type
