model.frame method for
arbor
objects.
model.frame.arbor(formula, ...)
model.frame suitable for fitting an
arbor-based
model. Called by
arbor and other functions for manipulating
arbor
objects.
This function is a method for the generic function
model.frame for
class
arbor. It can be invoked by calling
model.frame for an object
of the appropriate class, or directly by calling
model.frame.arbor
regardless of the class of the object.