Extract Names from a formula

DESCRIPTION:

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.

SEE ALSO:

, ,

EXAMPLES:

Names(distance ~ Sex * age, data = Orthodont)