Categorical Regression Transformation Plots

The Plots dialog box allows you to specify the variables that will produce transformation and residual plots.

Transformation Plots. For each of these variables, the category quantifications are plotted against the original category values. Empty categories appear on the horizontal axis but do not affect the computations. These categories are identified by breaks in the line connecting the quantifications.

Residual Plots. For each of these variables, residuals (computed for the dependent variable predicted from all predictor variables except the predictor variable in question) are plotted against category indicators and the optimal category quantifications multiplied with beta against category indicators.

To Obtain Plots in CATREG

1. Select the dependent and independent variables in the Categorical Regression dialog box.
2. Click Plot.
3. Select the variables for which transformation or residuals plots will be produced.
4. Click Continue.