update: Update Methods

Description

The method updates an object by modifying its specification. Currently, it is used to change the set of knots by either selecting them manually or by specifying the selection methods.

Usage

# S3 method for cslseModel
update(object, selType, selCrit="AIC",
                            selKnots, ...)
# S3 method for slseModel
update(object, selType, selCrit="AIC",
                           selKnots, ...)
# S3 method for slseKnots
update(object, selKnots, ...)

Value

It returns an object of the same class, but with a different set of knots.

Arguments

object: An object to be modified.
selKnots: An optional list of integers to select the knots from the original list of knots. If missing, the current knots are kept.
selType: The selection method: "BLSE" for the backward method, "FLSE" for the forward method or "none" to recover the originnal set of knots.
selCrit: The criterion to select the optimal set of knots.
...: Argument for other types of objects. Currently not used.

Details

The method for slseKnots is explained in the vignette, but it is mostly used internally. For the model objects, the method can be used to choose a set of knots already stored in the object. It avoids having to re-compute them which can be computationally intensive for large samples. It returns an error message if the type of selection requested does not exist. In that case, you need to run the selSLSE method. If the selType argument is set to None, the method returns the original model.

Examples

Run this code

data(simDat3)
mod1 <- cslseModel(Y ~ Z | ~ X1 * X2, data = simDat3)
mod2 <- selSLSE(mod1, "BLSE", "AIC")

## We changed the knots to the BLSE-BIC selection
## already stored in the model object

update(mod2, "BLSE", "BIC")

## We recover the original set of knots

update(mod2, "None")