glsStruct {nlme} | R Documentation

## Generalized Least Squares Structure

### Description

A generalized least squares structure is a list of model components representing different sets of parameters in the linear model. A `glsStruct` may contain `corStruct` and `varFunc` objects. `NULL` arguments are not included in the `glsStruct` list.

### Usage

    glsStruct(corStruct, varStruct)

### Arguments

`corStruct` | an optional `corStruct` object, representing a correlation structure. Default is `NULL`.
`varStruct` | an optional `varFunc` object, representing a variance function structure. Default is `NULL`.

### Value

a list of model variance-covariance components determining the parameters to be estimated for the associated linear model.

### Author(s)

Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu

### See Also

`gls`, `corClasses`, `varFunc`

### Examples

    gls1 <- glsStruct(corAR1(), varPower())

[Package Contents]