getGroupsFormula.lmList: Extract lmList Object Grouping Formula
Description
A formula representing the grouping factor determining the
partitioning of the observations used to produce the lm
components of object is obtained and returned as a list with a
single component, or as a one-sided formula.
Usage
getGroupsFormula(object, asList)
Arguments
object
an object inheriting from class lmList, representing
a list of lm objects with a common model.
asList
an optional logical value. If TRUE the returned
value with be a list of formulas; else, if FALSE the returned
value will be a one-sided formula. Defaults to FALSE.
Value
a one-sided formula, or a list with a single one-sided formula,
representing the grouping factor corresponding to the lm
components of object.