Extract groupedData Formula

Usage

formula(object)

Arguments

object an object inheriting from class groupedData.

Description

This method function extracts the display formula associated with a groupedData object. This is a two-sided formula of the form resp ~ cov | group, with resp is the response, cov is the primary covariate, and group is the grouping structure.

Value

a two-sided formula with a conditioning expression, representing the display formula for object.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

groupedData

Examples

library(lme)
data(Orthodont)
formula(Orthodont)

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