Plotting in conquestr

Dan Cloney

2022-04-01

Introduction

conquestr has two main types of plots. The first is plots based on the plot command in ACER ConQuest. These plots are done using the generic function conquestr::plotRout The second is more general plots, usually of the inputs or outputs of IRT estimate.

Example

plotRout

library(conquestr)
myRout<- ConQuestRout()
#> no rout file provided, loading the example rout file instead
plotRout(myRout)

General Plots

You can plot an arbitrary information function against a distribution of students - a so called information Wright map.

myItems<- runif(10, -1, 1)
myPersons<- rnorm(500, 1, 1)
informationWrightMap(myItems = myItems, myAbilities = myPersons, minTheta = -6, maxTheta = 6)