This method function returns the names of the terms corresponding to
the right hand side of
object (treated as a linear formula),
obtained as the column names of the corresponding
model.matrix
.
USAGE:
Names(object, data, exclude)
REQUIRED ARGUMENTS:
object
an object inheriting from class
formula.
OPTIONAL ARGUMENTS:
data
an optional data frame containing the variables specified
in
object. By default the variables are taken from the
environment from which
Names.formula is called.
exclude
an optional character vector with names to be excluded
from the returned value. Default is
c("pi",".").
VALUE:
a character vector with the column names of the
model.matrix
corresponding to the right hand side of
object which are not
listed in
excluded.