Extract Variance Function Weights
Usage
varWeights(object)
Arguments
object
|
an object inheriting from class code{varFunc},
representing a variance function structure.
|
Description
The inverse of the standard deviations corresponding to the variance
function structure represented by object
are returned.Value
if object
has a weights
attribute, its value is
returned; else NULL
is returned.Author(s)
Jose Pinheiro and Douglas BatesSee Also
logLik.varFunc
Examples
library(lme)
data(Orthodont)
vf1 <- varPower(form=~age)
vf1 <- initialize(vf1, Orthodont)
coef(vf1) <- 0.3
varWeights(vf1)[1:10]