Check if Update is Needed

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.

needUpdate(object)

Arguments

object

any object

Value

a logical value indicating whether object needs to be updated.

Author

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

vf1 <- varExp()
vf1 <- Initialize(vf1, data = Orthodont)
needUpdate(vf1)
#> [1] TRUE