[R] how to estimate Type I, Type III SS

[John Fox]

Dear Federico and Kum-Hoe,

The Anova function in the car package will compute "Type II" or "Type III"
tests (with the former as the default); anova() computes "Type I"
(sequential) tests. Be careful with the contrast coding for Type III tests.

Regards,
 John

--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox 
-------------------------------- 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of 
> Federico Calboli
> Sent: Wednesday, April 06, 2005 7:49 AM
> To: Kum-Hoe Hwang
> Cc: r-help
> Subject: Re: [R] how to estimate Type I, Type III SS
> 
> On Wed, 2005-04-06 at 21:40 +0900, Kum-Hoe Hwang wrote:
> > Howdy, R gurus
> >  I 'd like to know hwo to calculate or estimate SS of Type 
> I and Type 
> > III in ANOVA or other anaysis in R.
> >  Thanks,
> 
> If memory seves me well, try Anova in the car package
> 
> F
> --
> Federico C. F. Calboli
> Department of Epidemiology and Public Health Imperial 
> College, St Mary's Campus Norfolk Place, London W2 1PG
> 
> Tel  +44 (0)20 7594 1602     Fax (+44) 020 7594 3193
> 
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
> 
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