formula.corStruct: Extract corStruct Object Formula
Description
This method function extracts the formula associated with a
corStruct object, in which the covariate and the grouping
factor, if any is present, are defined.
Usage
formula(object)
Arguments
object
an object inheriting from class corStruct
representing a correlation structure.
Value
an object of class formula specifying the covariate and the
grouping factor, if any is present, associated with object.