Decision Tree Model Viewer

You can view a Decision Tree model in one of the following ways:

• Method 1

  1. Right-click the node where the model was built.

  2. Select Go to Properties.

  3. In the Models section in Properties, click .

• Method 2

  1. Select the workflow node where the model was built.

  2. Right-click and click View Models.

  3. Select the model to view.

  The Decision Tree viewer opens in a new tab. The default name of a Decision Tree model has DT in the name.

The Tree viewer has two tabs:

• Tree: This tab is displayed by default. Use the Structure Window to navigate and analyze the tree. It is split horizontally into two panes:

  • The upper pane displays the tree. The root node is at the top of the pane. The following information is displayed for each node of the tree:

    • Node number. 0 is the root node.

    • Prediction, the predicted target value.

    • Support for the prediction.

    • Confidence for the prediction.

    • A histogram shows the distribution of target values in the node.

    • Split, the attribute used to split the node (Leaf nodes do not have splits).

  • The lower pane displays rules. To view the rule associated with a node or a link, select the node or link. The rule is displayed in the lower pane. The following information is displayed in the lower pane:

    • Rule

    • Surrogates

    • Target Values

• Settings (DT)

Icons and menus at the top of the upper pane control how the tree and its nodes are displayed. You can perform the following tasks:

• Zoom in or zoom out for the tree. You can also select a size from the drop-down list. You can also fit the tree to the window.

• Change the layout to horizontal. The default Layout Type for the tree is vertical.

• Hide the histograms displayed in the node.

• Show less detail.

• Expand all nodes.

• Save Rules.