psychotree: node_profileplot – R documentation

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node_profileplot

Panel-Generating Function for Visualizing IRT Tree Models

Description

Panel-generating function for visualizing the parameters from the nodes in Rasch, rating scale or partial credit tree models.

Usage

node_profileplot(mobobj, what = c("items", "thresholds", "discriminations"),
  parg = list(type = NULL, ref = NULL, alias = TRUE), id = TRUE,
  names = FALSE, abbreviate = TRUE, index = TRUE, ref = TRUE, col = "black",
  border = col, linecol = "black", refcol = "lightgray", bg = "white",
  cex = 0.5, pch = 21, xscale = NULL, yscale = NULL, ylines = 2, ...)

Arguments

`mobobj`	an object of class `"mob"` based on rasch models fitted by `raschmodel`, rating scale models fitted by `rsmodel` or partial credit models fitted by `pcmodel`.
`what`	character, specifying the type of parameters to be plotted.
`parg`	list of arguments passed over to internal calls of `itempar`, `threshpar` or `discrpar`.
`id`	logical. Should the node ID be displayed?
`names`	logical or character. If `TRUE`, the names of the items are displayed on the x-axis. If `FALSE`, numbers of items are shown. Alternatively a character vector of the same length as the number of items can be supplied.
`abbreviate`	logical. Should item names be abbreviated? If numeric this controls the length of the abbreviation.
`index`	logical. Should different indexes for different items be used?
`ref`	logical. Should a horizontal line for the reference level be drawn?
`col, border, pch, cex`	graphical appearance of plotting symbols.
`linecol, refcol`	character, specifying the line color to use for the profile lines and reference line, respectively.
`bg`	color for background filling.
`xscale, yscale`	x and y axis limits.
`ylines`	numeric. Number of lines used for y-axis labels.
`...`	further arguments currently not used.

Details

The panel-generating function node_profileplot is called by the plot method for "raschtree" objects and does not have to be called by the user directly.

Prior to version 0.13-1, node_profileplot was called node_raschplot.

Value

A panel function which can be supplied to the plot method for "mob" objects.

node_profileplot

Description

Usage

Arguments

Details

Value

See Also

psychotree

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