gen_formIRTPlot: Generate IRT plots given forms

In yuehmeir2/CATShinyModules: CATShinyModules

Description

The supported IRT plots include "Information", "CSEM", "Expected_Percent_Score", "Expected_Raw_Score".

Usage

gen_formIRTPlot(
  metadata,
  formInf,
  joinBy,
  IRT_fun = "Information",
  theta = c(-4, 4),
  IRTParCols,
  IRTModelCol,
  IRTScale = 1,
  showLegend = T,
  opacity = 0.6,
  plotType = c("curve", "")
)

Arguments

metadata	a data frame contains IRT parameters and categorical attributes
formInf	form information in tibble that must contain columns named form_id and item_id
joinBy	join for formInf and metadata
IRT_fun	one or multiple IRT plot names, which could be "Information", "CSEM", "Expected_Percent_Score", or/and "Expected_Raw_Score".
theta	A vector of ability values
IRTParCols	A vector of colnames that have the columns required by the IRT model of choice.
IRTModelCol	A column that specifies the IRT model for each item. This can also be a single value, which will be recycled.
IRTScale	A vector of scaling parameters used in the IRT models. This can also be a single value, which will be recycled.

yuehmeir2/CATShinyModules documentation built on June 13, 2021, 7:02 p.m.