Counting and Recounting Decision Trees

Tree counting occurs automatically the first time you change the node view to Counts or Counts-labels in the Tree View, or the first time you select the Profile View or Leaf View during the current session of the decision tree.

Counting, and later recounting, ensures that statistics are available for the various views.

Once a decision tree is counted initially, all subsequent recounts, in all views, must be performed manually.

Count a tree by changing the node view. Click the drop-down arrow beneath the Tree View button and choose Counts or Counts-labels. The counts show with no color. Click Tree View > Counts > Color by Treatments or Counts-labels > Counts-lables > Color by Treatments.

Decision Tree Node View Menu

The node view options include:

• Compact: which displays the condition for each condition node to the right of a small circle, without counts. Each time you open a tree, the default node view is Compact which does not display counts.
• Counts: which displays the counts > no color if selected.
  • Counts > No Color: which displays the node condition as a rectangle containing the total counts and weighted percentage of the total for each node.
  • Counts > Color by Treatments: which displays the node condition as a rectangle containing the total counts and weighted percentage of the total for each node, colored based on treatments. The color shows the proportion of input records that pass into a node's split pathways. The colors can be edited via the Assign Treatments dialogue, for more information see Treatments and Decision Trees.
    • This visualization can be very useful in quickly identifying splits that might benefit from additional tuning.
  • Counts > Color by <target> (if a target is selected), where <target> is the name of the selected target: which displays the node condition as a rectangle containing the total counts and weighted percentage of the total for each node, colored based on the target. The target colors cannot be edited.
    • The color shows the proportion of input records that pass into a node's split pathways. This visualization can be very useful in quickly identifying splits that might benefit from additional tuning.
• Counts-labels: which displays the counts-label > no color is selected.
  • Counts-labels > No Color: which displays the node condition and the total number of counts and their weighted percentage of the total, together with their respective labels; that is #T for total number of raw counts of the data set and W%T for weighted percent of the total counts of the data set.
  • Counts-labels > Color by Treatments: which displays the node condition and the total number of counts and their weighted percentage of the total, together with their respective labels; that is #T for total number of raw counts of the data set and W%T for weighted percent of the total counts of the data set, colored based on treatments. The colors can be edited via the Assign Treatments dialogue, for more information see Treatments and Decision Trees.
    • The color shows the proportion of input records that pass into a node's split pathways. This visualization can be very useful in quickly identifying splits that might benefit from additional tuning.
  • Counts-labels > Color by <target> (if a target is selected), where <target> is the name of the target: which displays the node condition and the total number of counts and their weighted percentage of the total, together with their respective labels; that is #T for total number of raw counts of the data set and W%T for weighted percent of the total counts of the data set, colored based on the selected target. The target colors cannot be edited.
    • The color shows the proportion of input records that pass into a node's split pathways. This visualization can be very useful in quickly identifying splits that might benefit from additional tuning.

      
      
      

• Click Profile View or Leaf View to view the statistics.
• Click Treatments Summary to view the summary information of all the treatments of the tree by name, rank, total and weighted percent by treatments.

Note When you select Counts or Counts-labels, the Proportion and Recount buttons appear in the decision tree toolbar.

If you have not specified which profiling variables you are interested in, you will be prompted to do so when a tree count requires it; just select one or more variables presented from the drop-down list.

When you modify your tree, such as editing or inserting splits, or merging rows, you will need to click Recount to update the count. Alternatively, you can right-click a decision node and select Trigger recount.

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