logLik.varFunc function

Extract varFunc logLik

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.

## S3 method for class 'varFunc'
logLik(object, data, ...)

Arguments

• object: an object inheriting from class "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.
• ...: some methods for this generic require additional arguments. None are used in this method.

Returns

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

Author(s)

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

See Also

logLik.lme

Examples

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