Assign varFunc Covariate

Usage

covariate(object) <- value

Arguments

object an object inheriting from class code{varFunc}, representing a variance function structure.
value a value to be assigned to the covariate associated with object.

Description

The covariate(s) used in the calculation of the weights of the variance function represented by object is (are) replaced by value. If object has been initialized, value must have the same dimensions as getCovariate(object).

Value

a varFunc object similar to object, but with its covariate attribute replaced by value.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

getCovariate.varFunc

Examples

library(lme)
data(Orthodont)
vf1 <- varPower(1.1, form = ~age)
covariate(vf1) <- Orthodont[["age"]]

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