IBM SPSS Modeler Cookbook

Selecting variables using the CHAID Modeling node

In this recipe we will identify and select variables to include as model inputs using the CHAID node.

You will need a copy of Microsoft Excel to visualize and select the chi-square values for each variable.

Getting ready

This recipe uses the datafile cup98lrn_reduced_vars3.sav and the stream recipe_variableselection_chaid.str.

How to do it...

To identify and select variables to include as model inputs using the CHAID node:

1. Open the stream variableselection_chaid.str by navigating to File | Open Stream and selecting the stream.
2. Make sure the datafile points to the correct path for the file cup98lrn_reduced_vars3.sav.
3. Open the Type node named CHAID Types. Notice that there are several variables of type continuous ...