R: Initialize reStruct Object

Initialize.reStruct {nlme}

R Documentation

Initialize reStruct Object

Description

Initial estimates for the parameters in the pdMat objects forming object, which have not yet been initialized, are obtained using the methodology described in Bates and Pinheiro (1998). These estimates may be refined using a series of EM iterations, as described in Bates and Pinheiro (1998). The number of EM iterations to be used is defined in control.

Usage

## S3 method for class 'reStruct'
Initialize(object, data, conLin, control, ...)

Arguments

`object`	an object inheriting from class `reStruct`, representing a random effects structure and consisting of a list of `pdMat` objects.
`data`	a data frame in which to evaluate the variables defined in `formula(object)`.
`conLin`	a condensed linear model object, consisting of a list with components `"Xy"`, corresponding to a regression matrix (`X`) combined with a response vector (`y`), and `"logLik"`, corresponding to the log-likelihood of the underlying model.
`control`	an optional list with a single component `niterEM` controlling the number of iterations for the EM algorithm used to refine initial parameter estimates. It is given as a list for compatibility with other `Initialize` methods. Defaults to `list(niterEM = 20)`.
`...`	some methods for this generic require additional arguments. None are used in this method.

Value

an reStruct object similar to object, but with all pdMat components initialized.

Author(s)