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IBM SPSS Modeler Cookbook by Scott Mutchler, Tom Khabaza, Meta S. Brown, Dean Abbott, Keith McCormick

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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 ...

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