psychotree: node_btplot – R documentation

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psychotree

node_btplot

Panel-Generating Function for Visualizing Bradley-Terry Tree Models

Description

Panel-generating function for visualizing the worth parameters from the nodes in Bradley-Terry tree models.

Usage

node_btplot(mobobj, id = TRUE,
  worth = TRUE, names = TRUE, abbreviate = TRUE, index = TRUE, ref = TRUE,
  col = "black", refcol = "lightgray", bg = "white", cex = 0.5, pch = 19,
  xscale = NULL, yscale = NULL, ylines = 1.5)

Arguments

`mobobj`	an object of class `"mob"` based on Bradley-Terry models fitted by `btmodel`.
`id`	logical. Should the node ID be displayed?
`worth`	logical. Should worth parameters (or their logs) be visualized?
`names`	logical. Should the names for the objects be displayed?
`abbreviate`	logical or numeric. Should object names be abbreviated? If numeric this controls the length of the abbreviation.
`index`	logical. Should different indexes for different stimuli be used?
`ref`	logical. Should a horizontal line for the reference level be drawn? Alternatively, `ref` can also be numeric or character to employ a reference level different from that stored in the model object.
`col, cex, pch`	graphical appearance of plotting symbols.
`refcol`	line color for reference line (if `ref`).
`bg`	color for background filling.
`xscale, yscale`	x and y axis limits.
`ylines`	numeric. Number of lines used for y-axis labels.

Details

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

Value

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