Extract varFunc logLik

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.

USAGE:

logLik(object, data) 

REQUIRED ARGUMENTS:

object
an object inheriting from class varFunc, representing a variance function structure.

OPTIONAL ARGUMENTS:

data
this argument is included to make this method function compatible with other logLik methods and will be ignored.

VALUE:

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

EXAMPLES:

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