nlme (version 3.1-166)

needUpdate.modelStruct: 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

# S3 method for modelStruct
needUpdate(object)

Value

a logical value indicating whether any element of object needs to be updated.

Arguments

object

an object inheriting from class "modelStruct", representing a list of model components, such as corStruct and varFunc objects.

Author

José Pinheiro and Douglas Bates

See Also

needUpdate

Examples

lms1 <- lmeStruct(reStruct = reStruct(pdDiag(diag(2), ~age)),
   varStruct = varPower(form = ~age))
needUpdate(lms1)