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)