summary.varFunc {nlme} | R Documentation

## Summarize varFunc Object

### Description

A `structName` attribute, with the value of corresponding argument, is appended to `object` and its class is changed to `summary.varFunc`.

### Usage

    ## S3 method for class 'varFunc'
    summary(object, structName, ...)

### Arguments

`object` | an object inheriting from class `varFunc`, representing a variance function structure.

`structName`

an optional character string with a description of the `varFunc` class. Default depends on the method function: `"Combination of variance functions"` for `varComb`, `"Constant plus power of covariate"` for `varConstPower`, `"Exponential of variance covariate"` for `varExp`, `"Different standard deviations per stratum"` for `varIdent`, `"Power of variance covariate"` for `varPower`, and `data.class(object)` for `varFunc`.

`...` | some methods for this generic require additional arguments. None are used in this method.

### Value

an object similar to `object`, with an additional attribute `structName`, inheriting from class `summary.varFunc`.

### Author(s)

Jose Pinheiro and Douglas Bates bates@stat.wisc.edu

### See Also

`varClasses`, `varFunc`

### Examples

    vf1 <- varPower(0.3, form = ~age)
    vf1 <- Initialize(vf1, Orthodont)
    summary(vf1)

[Package nlme version 3.1-104 Index]