Extract Data Frame Covariate

Usage

getCovariate(object, form)

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).

Description

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

Value

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

Author(s)

Jose Pinheiro and Douglas Bates

See Also

getCovariateFormula

Examples

library(lme)
data(Orthodont)
getCovariate(Orthodont)


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