For a CUB model with shelter fitted to ordinal, by default it returns a plot of the estimated
\((1-\pi, 1-\xi)\) as a point in the parameter space, labeled with the estimated shelter parameter \(\delta\).
Depending on csiplot and paiplot and on desired output, \(x\) and \(y\) coordinates may be set
to \(\pi\) and \(\xi\), respectively.
Arguments
ordinal
Vector of ordinal responses
shelter
Category corresponding to the shelter choice
csiplot
Logical: should \(\xi\) or \(1-\xi\) be the \(y\) coordinate
paiplot
Logical: should \(\pi\) or \(1-\pi\) be the \(x\) coordinate
...
Additional arguments to be passed to plot() and text(). Optionally, the number m
of ordinal categories may be passed: this is recommended if some category has zero frequency.
Details
It represents an estimated CUB model with shelter effect as a point
in the parameter space with shelter estimate indicated as label.