R help - Jul 2003 - : performing marginal tests to glm objects

Dear all,

I wonder if it is possible to obtain marginal tests for effects in generalized
linear models. Indeed, the anova function produces sequential tests and it
doesn't have any "type" argument to specify that we would like
marginal tests instead, as in the similar anova function for lme objects.

Thanks a lot for your help!

Eve CORDA
Office national de la chasse et de la faune sauvage 
(http://www.oncfs.gouv.fr)
BP 20 
78612 Le Perray en Yvelines Cedex
FRANCE
Phone: +33 (0)1 30 46 60 64
Fax:     +33 (0)1 30 46 60 99
e.corda@oncfs.gouv.fr


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?drop1 for the valid marginal tests.

If you want `type III' tests (which aren't marginal in the usual sense) 
see Anova in package car, which also does `type II' tests (as performed by 
drop1).

On Thu, 24 Jul 2003, Eve Corda wrote:
> I wonder if it is possible to obtain marginal tests for effects in
> generalized linear models. Indeed, the anova function produces
> sequential tests and it doesn't have any "type" argument to
specify that
> we would like marginal tests instead, as in the similar anova function
> for lme objects.
> 
-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595