Compute analysis of variance (or deviance) tables for one or more fitted model objects.
- an object containing the results returned by a model
fitting function (e.g.,
- additional objects of the same type.
This (generic) function returns an object of class
anova. These objects represent analysis-of-variance and analysis-of-deviance tables. When given a single argument it produces a table which tests whether the model terms are significant.When given a sequence of objects,
anovatests the models against one another in the order specified.The print method for
anovaobjects prints tables in a pretty form.
The comparison between two or more models will only be valid if they
are fitted to the same dataset. This may be a problem if there are
missing values and R's default of
na.action = na.omit is used.
Chambers, J. M. and Hastie, T. J. (1992) Statistical Models in S, Wadsworth & Brooks/Cole.