cubvisual function

Plot an estimated CUB model

Plotting facility for the CUB estimation of ordinal responses.

cubvisual(ordinal,csiplot=FALSE,paiplot=FALSE,...)

Arguments

• ordinal: Vector of ordinal responses
• 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.

Returns

For a CUB model fit to ordinal, by default it returns a plot of the estimated $(1-\pi, 1-\xi)$ as a point in the parameter space. Depending on csiplot and paiplot

and on desired output, $x$ and $y$ coordinates may be set to $\pi$ and $\xi$, respectively.

Details

It represents an estimated CUB model as a point in the parameter space with some useful options.

Examples

data(univer)
ordinal<-univer$global
cubvisual(ordinal,xlim=c(0,0.5),ylim=c(0.5,1),cex=0.8,main="Global Satisfaction")