nlme: Covariate.varFunc – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

Covariate.varFunc

Assign varFunc Covariate

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).

Usage

## S3 replacement method for class 'varFunc'
covariate(object) <- value

Arguments

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

Value

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

Author(s)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

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

nlme

Linear and Nonlinear Mixed Effects Models

v3.1-152

GPL (>= 2) | file LICENCE

Authors

José Pinheiro [aut] (S version), Douglas Bates [aut] (up to 2007), Saikat DebRoy [ctb] (up to 2002), Deepayan Sarkar [ctb] (up to 2005), EISPACK authors [ctb] (src/rs.f), Siem Heisterkamp [ctb] (Author fixed sigma), Bert Van Willigen [ctb] (Programmer fixed sigma), Johannes Ranke [ctb] (varConstProp()), R-core [aut, cre]

Initial release

2021-02-03