update {causalSLSE}

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 class 'cslseModel'
update(object, selType, selCrit="AIC",
                            selKnots, ...)

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

## S3 method for class 'slseKnots'
update(object, selKnots, ...)

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.

Value

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

See Also

selSLSE for more details on how stored knots can be selected from a model, slseModel for model description and slseKnots for the format of knots

Examples

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")