Skip to contents

Plot the person-item threshold distribution

Source: R/plots.R
plot_pimap.Rd

The targeting display: the person location distribution above the axis and the item threshold distribution mirrored below it, on a shared logit scale.

Usage

plot_pimap(fit, bins = 35, xlim = NULL)

Arguments

fit

A fitted object from rasch.

bins

Number of histogram bins.

xlim

Optional logit range for the shared scale; persons and thresholds outside it are omitted.

Value

Called for its plotting side effect; invisibly NULL.

Examples

set.seed(1)
d <- seq(-2, 2, length.out = 6)
X <- matrix(rbinom(400 * 6, 1, plogis(outer(rnorm(400), d, "-"))), 400, 6)
colnames(X) <- paste0("I", 1:6)
plot_pimap(rasch(X))