[R] testing factor effects in glm

[John Fox]

Dear Istvan,

You might want to take a look at the Anova() and linear.hypothesis()
functions in the car package.

Regards,
 John

 
 On Wed, 22 Feb 2006, I.Szentirmai wrote:
 
> Dear All,
> 
> I'm using a glm to analyse the effect of year on a 
> variable with poisson distribution. Using the summary() I 
> can test whether years are different from each other, but 
> how can I test whether year has an overall effect on my 
> respons variable? My guess is that by a Wald-test, but I 
> don't know how exactly.