mirt (version 0.2.6)

itemplot: Displays item surface and information plots

Description

itemplot displays various item based IRT plots.

Arguments

object

a computed model of class bfactorClass, mirtClass, or polymirtClass

...

additional arguments to be passed on to plink generic plot(). See the plink package for further details.

See Also

plot, mirt, bfactor, polymirt

Examples

data(LSAT7)
fulldata <- expand.table(LSAT7)
mod1 <- mirt(fulldata,1)
mod2 <- mirt(fulldata,2)

itemplot(mod1)
itemplot(mod1, combine = 5, auto.key=list(space="right"))

itemplot(mod2, drape = TRUE)
itemplot(mod2, type = "vectorplot1")