recalc.varFunc function

Recalculate for varFunc Object

This method function pre-multiples the "Xy" component of conLin by a diagonal matrix with diagonal elements given by the weights corresponding to the variance structure represented by objecte and adds the log-likelihood contribution of object, given by logLik(object), to the "logLik"

component of conLin.

## S3 method for class 'varFunc'
recalc(object, conLin, ...)

Arguments

• object: an object inheriting from class "varFunc", representing a variance function structure.
• conLin: a condensed linear model object, consisting of a list with components "Xy", corresponding to a regression matrix (X) combined with a response vector (y), and "logLik", corresponding to the log-likelihood of the underlying model.
• ...: some methods for this generic require additional arguments. None are used in this method.

Returns

the recalculated condensed linear model object.

Author(s)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Note

This method function is only used inside model fitting functions, such as lme and gls, that allow heteroscedastic error terms.

See Also

recalc, varWeights, logLik.varFunc