OrdVarCoordinates {MultBiplotR}

Coordinates of an ordinal variable on the biplot.

Description

Coordinates of an ordinal variable on the biplot.

Usage

OrdVarCoordinates(tr, b = c(1, 1), inf = -12, sup = 12, step = 0.01,
                 plotresponse = FALSE, label = "Item", labx = "z", laby
                 = "Probability", catnames = NULL, Legend = TRUE,
                 LegendPos = 1)

Arguments

tr

A vector containing the thresholds of the model, that is, the constatn for each category of the ordinal variable

b

Vector containing the common slopes for all categories of the ordinal variable

inf

The inferior limit of the values to be sampled on the biplot axis (it depends on the scale of the biplot).

sup

The superior limit of the values to be sampled on the biplot axis (it depends on the scale of the biplot).

step

Increment (step) of the squence

plotresponse

Should the item be plotted

label

Label of the item.

labx

Label for the X axis in the summary of the item.

laby

Label for the Y axis in the summary of the item.

catnames

Names of the categories.

Legend

Should a legend be plotted

LegendPos

Position of the legend.

Details

The function calculates the coordinates of the points that define the separation among the categories of an ordinal variable projected onto an ordinal logistic biplot.

Value

An object of class OrdVarCoord

z

Values of the cut points on the scale of the biplot axis (not used)

points

The points for the marks to be represented on the biplot.

labels

The labels for the points

hidden

Are there any hidden categories? (Categories whose probability is never hier than the probabilities of the rest)

cathidden

Number of the hidden cateories

Author(s)

Jose Luis Vicente Villardon

References

Vicente-Villardon, J. L., & Sanchez, J. C. H. (2014). Logistic Biplots for Ordinal Data with an Application to Job Satisfaction of Doctorate Degree Holders in Spain. arXiv preprint arXiv:1405.0294.

Examples

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