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)an object of class "mob" based on Bradley-Terry models
fitted by btmodel.
logical. Should the node ID be displayed?
logical. Should worth parameters (or their logs) be visualized?
logical. Should the names for the objects be displayed?
logical or numeric. Should object names be abbreviated? If numeric this controls the length of the abbreviation.
logical. Should different indexes for different stimuli be used?
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.
graphical appearance of plotting symbols.
line color for reference line (if ref).
color for background filling.
x and y axis limits.
numeric. Number of lines used for y-axis labels.
A panel function which can be supplied to the plot method for
"mob" objects.
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.