R2MLwiN (version 0.8-1)

caterpillarR: Draws caterpillar plots of the residuals from a mlwinfitIGLS-class or mlwinfitMCMC-class object, at a chosen level of the multilevel model.

Description

Uses qqmath in the lattice package to draw Quantile-Quantile plots of the residuals at a chosen level of a multilevel model against a theoretical distribution.

Usage

caterpillarR(resi, lev = 2)

Arguments

resi

A mlwinfitIGLS-class or mlwinfitMCMC-class object (model must be fitted specifying resi.store = TRUE and including

lev

An integer scalar specifying the level of a multilevel model for which to produce a plot for.

Value

• See qqmath.

See Also

caterpillar, qqmath

Examples

library(R2MLwiN)
# NOTE: if MLwiN not saved where R2MLwiN defaults to:
# options(MLwiN_path = 'path/to/MLwiN vX.XX/')
# If using R2MLwiN via WINE, the path may look like:
# options(MLwiN_path = '/home/USERNAME/.wine/drive_c/Program Files (x86)/MLwiN vX.XX/')

# Example using tutorial dataset
data(tutorial, package = 'R2MLwiN')
mymodel <- runMLwiN(normexam ~ 1 + (1 | school) + (1 | student),
                    estoptions = list(resi.store = TRUE),
                    data = tutorial)
# Caterpillar plot
caterpillarR(mymodel['residual'], lev = 2)