pimap: Person-Item Map

In DavideMassidda/raschTools: Rasch analysis tools

Description

Person-item map for the Partial Credit Model estimated with the function PCM of the eRm package.

Usage

pimap(data.pr, data.it, logit.pr, logit.it, item, thr, rel_widths = c(1,2),
      logit.range = NULL, binwidth = 0.25, xlab.pr = "", xlab.it = "Item",
      ylab.pr = "Count", ylab.it = "logit", title.pr = "Person\'s abilities",
      title.it = "Item thresholds")

Arguments

data.pr	to do
data.it	to do
logit.pr	to do
logit.it	to do
item	to do
thr	to do
rel_widths	to do
logit.range	to do
binwidth	to do
xlab.pr	to do
xlab.it	to do
ylab.pr	to do
ylab.it	to do
title.pr	to do
title.it	to do

Details

to do

Author(s)

Davide Massidda [e-mail]

See Also

PCM

Examples

## Not run: 
data(test2)
fit <- PCM(test2)
persPar <- person.parameter(fit)
persPar <- data.frame(logit=persPar$thetapar[[1]])
itemPar <- thresholds(fit)
itemPar <- data.frame(itemPar$threshtable[[1]][,-1])
itemPar <- reshape(itemPar, varying=1:3, v.names="logit",
                   timevar="step", idvar="item", direction="long")
pimap(persPar, itemPar, logit.pr="logit",
      logit.it="logit", item="item", thr="step")

## End(Not run)

DavideMassidda/raschTools documentation built on April 27, 2021, 4:24 a.m.