nlme: getCovariate.data.frame – R documentation

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getCovariate.data.frame

Extract Data Frame Covariate

Description

The right hand side of form, stripped of any conditioning expression (i.e. an expression following a | operator), is evaluated in object.

Usage

## S3 method for class 'data.frame'
getCovariate(object, form, data)

Arguments

`object`	an object inheriting from class `data.frame`.
`form`	an optional formula specifying the covariate to be evaluated in `object`. Defaults to `formula(object)`.
`data`	some methods for this generic require a separate data frame. Not used in this method.

Value

the value of the right hand side of form, stripped of any conditional expression, evaluated in object.

Author(s)

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

Examples

getCovariate(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