Extract varFunc logLik

Usage

logLik(object, data)

Arguments

object an object inheriting from class code{varFunc}, representing a variance function structure.
data this argument is included to make this method function compatible with other logLik methods and will be ignored.

Description

This method function extracts the component of a Gaussian log-likelihood associated with the variance function structure represented by object, which is equal to the sum of the logarithms of the corresponding weights.

Value

the sum of the logarithms of the weights corresponding to the variance function structure represented by object.

Author(s)

Jose Pinheiro and Douglas Bates

Examples

library(lme)
data(Orthodont)
vf1 <- varPower(form = ~age)
vf1 <- initialize(vf1, Orthodont)
coef(vf1) <- 0.1
logLik(vf1)


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