TAM: plotDevianceTAM – R documentation

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Documentation

TAM

plotDevianceTAM

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

Test Analysis Modules

v3.6-45

GPL (>= 2)

Authors

Alexander Robitzsch [aut,cre] (<https://orcid.org/0000-0002-8226-3132>), Thomas Kiefer [aut], Margaret Wu [aut]

Initial release

2021-04-22 14:35:52