Check if Update is Needed
DESCRIPTION:
This function is generic; method functions can be written to handle
specific classes of objects. By default, it tries to extract a
needUpdate
attribute of
object
. If this is
NULL
or
FALSE
it returns
FALSE
; else it returns
TRUE
.
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
-
any object
VALUE:
a logical value indicating whether
object
needs to be updated.
EXAMPLES:
vf1 <- varExp()
vf1 <- initialize(vf1, data = Orthodont)
needUpdate(vf1)