update.varFunc: Update varFunc Object
Description
If the formula(object) includes a "." term, representing
a fitted object, the variance covariate needs to be updated upon
completion of an optimization cycle (in which the variance function
weights are kept fixed). This method function allows a reevaluation of
the variance covariate using the current fitted object and,
optionally, other variables in the original data.Usage
## S3 method for class 'varFunc':
update(object, data)
Value
if formula(object) includes a "." term, an
varFunc object similar to object, but with the
variance covariate reevaluated at the current fitted object value;
else object is returned unchanged.