Check if a modelStruct Object Needs Updating
DESCRIPTION:
This method function checks if any of the elements of
object
needs to be updated. Updating of objects usually takes place in
iterative algorithms in which auxiliary quantities associated with the
object, and not being optimized over, may change.
USAGE:
needUpdate(object)
REQUIRED ARGUMENTS:
- object
-
an object inheriting from class
modelStruct,
representing a list of model components, such as
corStruct and
varFunc objects.
VALUE:
a logical value indicating whether any element of
object needs
to be updated.
EXAMPLES:
lms1 <- lmeStruct(reStruct = reStruct(pdDiag(diag(2), ~age)),
varStruct = varPower(form = ~age))
needUpdate(lms1)