plotDevianceTAM: Deviance Plot for 'TAM' Objects

In TAM: Test Analysis Modules

Deviance Plot for TAM Objects

Description

Plots the deviance change in every iteration.

Usage

plotDevianceTAM(tam.obj, omitUntil=1, reverse=TRUE, change=TRUE)

Arguments

tam.obj	Object of class tam.mml, tam.mml.2pl or tam.mml.mfr.
omitUntil	An optional value indicating number of iterations to be omitted for plotting.
reverse	A logical indicating whether the deviance change should be multiplied by minus 1. The default is TRUE.
change	An optional logical indicating whether deviance change or the deviance should be plotted.

Author(s)

Martin Hecht, Sebastian Weirich, Alexander Robitzsch

Examples

#############################################################################
# EXAMPLE 1: deviance plot dichotomous data
#############################################################################
data(data.sim.rasch)

# 2PL model
mod1 <- TAM::tam.mml.2pl(resp=data.sim.rasch )
# plot deviance change
plotDevianceTAM( mod1 )
# plot deviance
plotDevianceTAM( mod1, change=FALSE)

TAM documentation built on May 29, 2024, 2:20 a.m.