nlme (version 3.1-163)

varWeights: 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)

Value

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

Arguments

object

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

Author

José Pinheiro and Douglas Bates

References

Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S and S-PLUS", Springer.

See Also

logLik.varFunc, varWeights

Examples

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