Produces a panel of linegraphs showing item thresholds over DIF nodes.
Usage
RIdifFigThresh(dfin, dif.var)
Arguments
- dfin
Dataframe with item data only
- dif.var
DIF variable
Details
NOTE: only works with PCM data where all variables have multiple thresholds,
since the threshpar() function has problems when dichotomous data are
included.