"Xy" component of
conLin by a diagonal matrix with diagonal elements given by the
weights corresponding to the variance structure represented by
objecte and adds the log-likelihood contribution of
object, given by logLik(object), to the "logLik"
component of conLin.recalc(object, conLin)varFunc,
representing a variance function structure."Xy", corresponding to a regression matrix
(X) combined with a response vector (y), and
"logLik", corresponding to the log-lvarWeights, logLik.varFunc