anova
Anova Tables
Compute analysis of variance (or deviance) tables for one or more fitted model objects.
 Keywords
 models, regression
Usage
anova(object, ...)
Arguments
 object
 an object containing the results returned by a model
fitting function (e.g.,
lm
orglm
).  ...
 additional objects of the same type.
Value

This (generic) function returns an object of class
anova
.
These objects represent analysisofvariance and analysisofdeviance tables.
When given a single argument it produces a table which
tests whether the model terms are significant.When given a sequence of objects, anova
tests
the models against one another in the order specified.The print method for anova
objects prints tables in a
‘pretty’ form.
Warning
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.
References
Chambers, J. M. and Hastie, T. J. (1992) Statistical Models in S, Wadsworth & Brooks/Cole.
See Also
coefficients
, effects
,
fitted.values
, residuals
,
summary
, drop1
, add1
.
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