plotModelCCC function

plotModelCCC

Creates a plot of a model implied category characteristic curve. Note this is not for use with rout files. See the generic function plotRout for plotting rout files.

plotModelCCC(item, range = c(-6, 6), by = 0.1, plotZero)

Arguments

• item: Item parameters for a single item.
• range: Lower and upper bounds to plot over (defaults to c(-6, 6).
• by: Increment to the sequence along `range``.
• plotZero: Should the zero category be plotted? Defaults to FALSE when item is dichotomous and TRUE otherwise.

Returns

A ggplot2 object.

Examples

myItem <- matrix(
  c(
    0, 0, 0, 1,
    1, 1, 0, 1
  ),
  ncol = 4, byrow=TRUE
)
myPlot <- plotModelCCC(myItem)