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
object
e and adds the log-likelihood contribution of
object
, given by
logLik(object), to the
logLik
component of
conLin.
USAGE:
recalc(object, conLin)
REQUIRED ARGUMENTS:
object
an object inheriting from class
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.
VALUE:
the recalculated condensed linear model object.
NOTE: This method function is only used inside model fitting
functions, such as
lme and
gls, that allow heteroscedastic error
terms.