irtoys: plot.trf – R documentation

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plot.trf

A plot method for test response functions

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

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

`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

Ivailo Partchev

plot(trf(Scored2pl))

A Collection of Functions Related to Item Response Theory (IRT)

v0.2.1

GPL (>= 2)

Authors

Ivailo Partchev [aut, cre], Gunter Maris [aut], Tamaki Hattori [ctb]

Initial release

2017-12-15