varFunc {nlme} | R Documentation |
If object
is a one-sided formula, it is used as the argument to
varFixed
and the resulting object is returned. Else, if
object
inherits from class varFunc
, it is returned
unchanged.
varFunc(object)
object |
either an one-sided formula specifying a variance
covariate, or an object inheriting from class varFunc ,
representing a variance function structure. |
an object from class varFunc
, representing a variance function
structure.
Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu
varFixed
, varWeights.varFunc
,
coef.varFunc
vf1 <- varFunc(~age)