plot.trf: A plot method for test response functions

In lebebr01/irtoys-2: Simple interface to the estimation and plotting of IRT models

Description

Useful for plotting test response functions. The x argument of trf should better be left out unless something special is required.

Usage

  ## S3 method for class 'trf'
 plot(x, add = FALSE,
    main = "Test response function", co = 1, ...)

Arguments

x	An object produced by function trf
add	When add=T, the IRF is added to a plot, otherwise a new plot is started. Default is F.
main	The main title of the plot, given that add=F.
co	The colour of the TRF curve. Default is 1 for black. Use co=NA to plot each TRF in a different colour.
...	Any additional plotting parameters

Author(s)

Ivailo Partchev

See Also

trf

Examples

plot(trf(Scored2pl$est))

lebebr01/irtoys-2 documentation built on May 20, 2019, 11:29 p.m.