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To view a decision tree model, use one of these methods:
Right-click the node where the where the model was built and select Go to Properties from the context menu. In the Models section of Properties, select the model and click .
Select the workflow node where the model was built and right-click. Select View Models from the context menu and then select the model to view.
The default name of a decision tree model has DT in the name.
The decision tree viewer opens in a new tab.
The tree viewer has two tabs:
Tree
Settings, described in Settings (DT)
The Tree tab is displayed by default.
The Structure Window helps you navigate and analyze the tree.
Icons and menus at the top of the upper pane control how the tree and its nodes are displayed:
You can 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.
The default Layout Type for the tree is vertical; you can change this to horizontal.
You can hide the histograms displayed in the node.
You can show less detail
You can expand all nodes.
You can Save Rules.
The Tree tab is split horizontally into two panes:
The upper pane displays the tree. The root node is at the top of the pane.
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.
In the upper 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)
Select a node; the following information is displayed in the lower pane:
Rule
Surrogates
Target Vales
A histogram of the target values in the node.
Select a link; the rule used for the split is displayed.