doBy (version 4.6-3)

parseGroupFormula: Extract components from a formula with "conditioning bar"

Description

Extract components from a formula with the form y ~ x1 + ... + xn | g1 + ... + gm

Usage

parseGroupFormula(form)

Arguments

form

A formula of the form y ~ x1 + ... + xn | g1 + ... + gm

Value

If the formula is y ~ x1 + x2 | g1 + g2 the result is

model

y ~ x1 + x2

groups

g1 + g2

groupFormula

~ g1 + g2

Examples

# NOT RUN {
gf <- parseGroupFormula(y ~ x1 + x2 | g1 + g2)
gf 

# }