plot_item_mastery {CDM}

R Documentation

S3 Methods for Plotting Item Probabilities

Description

This S3 method plots item probabilities for non-masters and masters of an item.

Usage

plot_item_mastery(object, pch=c(16,17), lty=c(1,2), ...)

## S3 method for class 'din'
plot_item_mastery(object, pch=c(16,17), lty=c(1,2), ...)

## S3 method for class 'gdina'
plot_item_mastery(object, pch=c(16,17), lty=c(1,2), ...)

Arguments

object	Object of classes din or gdina
pch	Point symbols for both groups
lty	Line symbols for both groups
...	More arguments to be passed.

Value

Plot

See Also

Plot functions for item response curves: IRT.irfprobPlot.

Examples

## Not run: 
#############################################################################
# EXAMPLE 1: Plot item mastery
#############################################################################

data(sim.dina)
data(sim.qmatrix)

#* estimate DINA Model
mod1 <- CDM::din(sim.dina, q.matrix=sim.qmatrix, rule="DINA")
#* estimate GDINA model
mod2 <- CDM::gdina(sim.dina, q.matrix=sim.qmatrix)

#* plots
plot_item_mastery(mod1)
plot_item_mastery(mod2)

## End(Not run)

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