ggiteminfo {tabledown} | R Documentation |
A Function for Creating Publication Quality Item Response Theory based item information plot.
Description
This function will create publication worthy Item Response Theory based item information plot. using ggplot2 from objects created from mirt pack.
Usage
ggiteminfo(model, item, theta)
Arguments
model |
A mirt package fitted object. |
item |
Item number (i.e. 1,2,3,4). |
theta |
Theta range. Put only one number. Theta =3 will be considered as theta range (-3 to 3). |
Value
A publication quality item information plot.Output object is a ggplot object.
Examples
data <- tabledown::Rotter[, 11:31]
model <- mirt::mirt(data, model = 1, itemtype = '2PL')
plot <- ggiteminfo(model, 1, 3)
[Package tabledown version 1.0.0 Index]