parseGroupFormula function

Extract components from a formula with "conditioning bar"

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

parseGroupFormula(form)

Arguments

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

Returns

If the formula is y ~ x1 + x2 | g1 + g2 the result is - model: y ~ x1 + x2 - groups: g1 + g2

• groupFormula: ~ g1 + g2

Examples

gf <- parseGroupFormula(y ~ x1 + x2 | g1 + g2)
gf

Author(s)

Søren Højsgaard, sorenh@math.aau.dk