node_btplot function

Panel-Generating Function for Visualizing Bradley-Terry Tree Models

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

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.

Returns

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

See Also

bttree