terms is a generic function
which can be used to extract terms objects
from various kinds of R data objects.
object used to select a method to dispatch.
further arguments passed to or from other methods.
There are methods for classes
the default method just extracts the
terms component of the
object, or failing that a
"terms" attribute (as used by
An object of class
c("terms", "formula") which contains the
terms representation of a symbolic model. See
terms.object for its structure.
Chambers, J. M. and Hastie, T. J. (1992) Statistical models. Chapter 2 of Statistical Models in S eds J. M. Chambers and T. J. Hastie, Wadsworth & Brooks/Cole.