Categorical Principal Components Analysis Object Plots

The Object and Variable Plots dialog box allows you to specify the types of plots you want and the variables for which plots will be produced.

Object points. A plot of the object points is displayed.

Objects and variables (biplot). The object points are plotted with your choice of the variable coordinates--component loadings or variable centroids.

Objects, loadings, and centroids (triplot). The object points are plotted with the centroids of multiple nominal-scaling-level variables and the component loadings of other variables.

Biplot and Triplot Variables. You can choose to use all variables for the biplots and triplots or select a subset.

Label Objects. You can choose to have objects labeled with the categories of selected variables (you may choose category indicator values or value labels in the Options dialog box) or with their case numbers. One plot is produced per variable if Variable is selected.

To Obtain Object Plots in CATPCA

1. Select the dependent and independent variables in the Categorical Principal Components dialog box.
2. In the Plots group, click Object.
3. Select the types of plots and variables for which plots will be produced and variables to label the objects in the plot.
4. Click Continue.