varWeights {nlme} | R Documentation

## Extract Variance Function Weights

### Description

The inverse of the standard deviations corresponding to the variance function structure represented by `object` are returned.

### Usage

    varWeights(object)

### Arguments

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

### Value

if `object` has a `weights` attribute, its value is returned; else `NULL` is returned.

### Author(s)

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

### See Also

`logLik.varFunc`

### Examples

    data(Orthodont)
    vf1 <- varPower(form=~age)
    vf1 <- Initialize(vf1, Orthodont)
    coef(vf1) <- 0.3
    varWeights(vf1)[1:10]

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