R: Recalculate for varFunc Object

Recalculate for varFunc Object

Usage

recalc(object, conLin)

Arguments

`object`	an object inheriting from class code{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.

Description

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.

Value

the recalculated condensed linear model object.

Note

This method function is only used inside model fitting functions which allow heteroscedastic error terms, like lme and gls.

Author(s)

Jose Pinheiro and Douglas Bates