| Names.formula {nlme} | R Documentation |
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.
## S3 method for class 'formula': Names(object, data, exclude, ...)
object |
an object inheriting from class formula. |
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","."). |
... |
some methods for this generic require additional arguments. None are used in this method. |
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.
Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu
Names(distance ~ Sex * age, data = Orthodont)