Description Usage Arguments Details Value Author(s) References See Also Examples
Update a gvlma object with changes to the linear model, the level of significance for global tests, or the time sequence used for the heteroscedasticity directional test.
1 2 |
object |
A gvlma object resulting from a call to |
formula |
(optional) A new formula describing the underlying linear model. |
... |
Additional arguments to be changed from the original call
to gvlma. These may include arguments to the |
All arguments other than alphalevel
and timeseq
(and
warn
) are passed
on to a call to update
for the underlying linear model.
If alphalevel
is
specified, then subsequent displays of the global and directional test
statistic decisions will be based on the new level of significance. If
timeseq
is specified, then the heteroscdasticity direction test,
S^2_4, will be updated to use the new time sequence.
A new gvlma object is returned.
Slate, EH slate@stat.fsu.edu and Pena, EA pena@stat.sc.edu.
Pena, EA and Slate, EH (2006). “Global validation of linear model assumptions,” J.\ Amer.\ Statist.\ Assoc., 101(473):341-354.
1 2 3 4 5 6 7 8 9 10 | data(CarMileageData)
CarModelAssess <- gvlma(NumGallons ~ MilesLastFill + NumDaysBetw,
data = CarMileageData)
CarModelAssess
summary(CarModelAssess)
CarModelNew <- update(CarModelAssess, alphalevel = 0.01)
CarModelNew
CarModelNew <- update(CarModelAssess, subset = -(1:10))
CarModelNew
summary(CarModelNew)
|
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