digram.wrightmap: Draw a Wrightmap

In jeppebundsgaard/RDigram: Analysis of Items from Tests and Surveys

Draw a Wrightmap

Description

Draw a Wrightmap

Usage

digram.wrightmap(
  mod,
  do = NULL,
  dimname = NULL,
  cols = collist,
  colscheme = "(.*)_.*",
  only.first.dim = F,
  verbose = T
)

Arguments

mod	Output from tam.mml or tam.fa.
do	A digram.object. Used to create title. Alternative to dimname
dimname	A string. Used to create title. Alternative to do.
cols	A vector of colors.
colscheme	A regular expression as string. Used to give items of the same type, same colors.
only.first.dim	If TRUE, only the first dimension of the model is used to draw the WrightMap.
verbose	Boolean. Set to TRUE to get information about progress.

Value

Returns a list of item difficulties as thresholds and person abilities as thetas

Examples

mod<-digram.estimate(DHP)
digram.wrightmap(mod=mod,do=DHP)

jeppebundsgaard/RDigram documentation built on Oct. 29, 2023, 7:15 p.m.