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) 

REQUIRED 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.

SEE ALSO:

EXAMPLES:

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