[R] typeIII SS for lme?

[Ramon Diaz-Uriarte]

Dear Bill,

You can obtain marginal tests using

anova(your.lme.object, type = "marginal")

(If you are going to compare output, note that marginal tests when using 
non-orthogonal contrasts ---SAS and treatment--- might give you unexpected 
results, last time I checked).

R.


On Thursday 11 December 2003 19:40, Bill Shipley wrote:
> To avoid angry replies, let me first say that I know that the use of
> Type III sums of squares is controversial, and that some statisticians
> recommend instead that significance be judged using the non-marginal
> terms in the ANOVA.  However, given that type III SS is also demanded by
> some
  is there a function (equivalent to drop1 for lm) to obtain type
> III sums of squares for mixed models using the lme function?
>
>
>
> Bill Shipley
>
> Associate Editor, Ecology
>
> North American Editor, Annals of Botany
>
> Département de biologie, Université de Sherbrooke,
>
> Sherbrooke (Québec) J1K 2R1 CANADA
>
> Bill.Shipley at USherbrooke.ca
>
>  <http://callisto.si.usherb.ca:8080/bshipley/>
> http://callisto.si.usherb.ca:8080/bshipley/
>
>
>
>
> 	[[alternative HTML version deleted]]
>
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-- 
Ramón Díaz-Uriarte
Bioinformatics Unit
Centro Nacional de Investigaciones Oncológicas (CNIO)
(Spanish National Cancer Center)
Melchor Fernández Almagro, 3
28029 Madrid (Spain)
Fax: +-34-91-224-6972
Phone: +-34-91-224-6900

http://bioinfo.cnio.es/~rdiaz
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