| varFunc {nlme} | R Documentation |
Variance Function Structure
Description
If object is a one-sided formula, it is used as the argument to
varFixed and the resulting object is returned. Else, if
object already inherits from class "varFunc",
such as all standard ‘varClasses’,
it is returned unchanged.
Usage
varFunc(object)
Arguments
object |
either an one-sided formula specifying a variance
covariate, or an object inheriting from class |
Value
an object from class "varFunc", representing a variance function
structure.
Author(s)
José Pinheiro and Douglas Bates bates@stat.wisc.edu
See Also
summary.varFunc,
varFixed,
varWeights.varFunc,
coef.varFunc
Examples
vf1 <- varFunc(~age)
[Package nlme version 3.1-167 Index]