plotItemMap function

plotItemMap

Creates a plot (ggplot2 object) of item parameter estimates and abilities on latent trait. Note this is not for use with rout files. See the method method plotRout.itemMap to the generic function plotRout

plotItemMap(mySys, myDims = "D1", ginLabs = "short", abilityType = "PV", ...)

Arguments

• mySys: An 'ACER ConQuest' system file object created using the conquestr::ConQuestSys function.

• myDims: A string specifying which specific dimensions should be included. The default is "D1", Specific dimensions are specified by the label "D1" for dimensions 1 etc.

• ginLabs: A string specifying whether short or long gin labels should be used. Default to "short".

• abilityType: What kind of person ability estimate should be used? Defaults to plausible values. Alternatively WLE, MLE, EAP.

• ...: Optional arguments, mostly for debugging, e.g., setDebug = TRUE

  will print temporary data frames.

Returns

A ggplot2 object.

Examples

mySys1 <- ConQuestSys()
myItemMap <- plotItemMap(mySys1)
## Not run:

# if you run the above example you will have the plot in the object `myItemMap`.
plot(myItemMap)
## End(Not run)