This is a method for the function anova for objects inheriting
from class "glm".
See anova for the general behavior of this function
and for the interpretation of test.
USAGE:
anova.glm(object, ..., test)
DETAILS:
When called with a single glm object, anova.glm may take a
while to run, because it fully iterates a series of glm models.
The series is constructed by successively adding to the null
model all the terms in object, taken in the order
they appear in terms(object).
Some efficiency is achieved by computing the model matrix only once,
and using glm.fit to perform the computations.
REFERENCES:
Chambers, J.M., and Hastie, T.J. (1991). Statistical Models in S,
pp. 210-213.