- Select a categorical variable in the
Predictor variables pane in the
Weight of Evidence (WoE) Startup Panel.
- Click the
Customize groups button to display the
Customize Groups for a Categorical Variable dialog box, which contains options to select a custom grouping for the discrete values of the predictor.
By default, the modified CHAID algorithm (described in the
Algorithm section of the
WoE Introductory Overview) is used to create a default best grouping for the selected variable.
Merging Groups
- To merge groups, click on the respective rows (groups) in the
Categories pane.
- Click the
Group button.
Results:
- Merged groups
- display with identical colors (red, or green)
- show common
WoE, Gini, and contribution to the
Information Value (IV) statistics
- The overall
Gini and
Information Value (IV) will update.
Splitting (UnGrouping) Groups
To remove one or more groups from a grouping:
- Highlight the respective groups by clicking on the respective rows in the
Categories pane.
- Click the
UnGroup button. All statistics will be updated.
Group
- Select rows (groups) in the
Categories pane.
- Click the
Group button to merge the selected groups.
UnGroup
To remove the selected group:
- Select a group in the merged groups.
- Click the
UnGroup button.
Clear Selection
To clear the selected groups in the
Categories pane, click the
Clear Selection button.
OK
To save the current grouping, click the
OK button.
Cancel
To abandon the current action, click the
Cancel button
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