nlme: Names.formula – R documentation

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Names.formula

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

## S3 method for class 'formula'
Names(object, data, exclude, ...)

Arguments

`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.

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.

Author(s)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

Examples

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

nlme

Linear and Nonlinear Mixed Effects Models

v3.1-152

GPL (>= 2) | file LICENCE

Authors

José Pinheiro [aut] (S version), Douglas Bates [aut] (up to 2007), Saikat DebRoy [ctb] (up to 2002), Deepayan Sarkar [ctb] (up to 2005), EISPACK authors [ctb] (src/rs.f), Siem Heisterkamp [ctb] (Author fixed sigma), Bert Van Willigen [ctb] (Programmer fixed sigma), Johannes Ranke [ctb] (varConstProp()), R-core [aut, cre]

Initial release

2021-02-03