Building a tree model directly

As an alternative to using the interactive tree builder, you can build a decision tree model directly from the node when the flow runs. This is consistent with most other model-building nodes. For C5.0 tree and Tree-AS models, which are not supported by the interactive tree builder, this is the only method that can be used.

1. Create a flow and add one of the decision tree nodes—C&R Tree, CHAID, QUEST, C5.0, or Tree-AS.
2. For C&R Tree, QUEST or CHAID, double-click the node to open its properties, then choose one of the main objectives from the Objectives tab. Ensure that What do you want to generate? is set to Generate a model node after run.

   For C5.0, on the Build Options tab, set Output type to Decision tree.

   For Tree-AS, on the Basics tab, specify the Tree growing algorithm type.

3. Select target and predictor fields and specify additional model options, as needed. For specific instructions, hover your mouse over the available tool tips.
4. Click Save and then run the flow to generate the model.

Comments about tree building

• When generating trees using this method, tree-growing directives are ignored.
• Whether interactive or direct, both methods of creating decision trees ultimately generate similar models. It's just a question of how much control you want along the way.