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Enter 0.33 for the Validation Portion.
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Note: In JMP Pro, a validation column can be used for validation. Select Validation and click Validation. Set the Validation Portion to 0.
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Click OK.
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On the platform report window, click Go to perform automatic splitting.
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Note: Because you are using a random Validation Portion, your results differ from those in Figure 4.2.
Figure 4.2 Partition Report for Diabetes
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Click the red triangle next to Partition for Y Binary and select Column Contributions.
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Figure 4.3 Column Contributions Report
The Column Contributions report shows that LTG and BMI are the only predictors in the decision tree model. Each column is used in two splits. Your results can differ. When the Validation Portion is used, the validation set is selected at random from the data table. If you redo your analysis, a new random validation set is selected and your results can differ from your first run.
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Click the red triangle next to Partition for Y Binary and select Save Columns > Save Prediction Formula.
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In the Diabetes.jmp data table, columns called Prob(Y Binary==Low), Prob(Y Binary==High), and Most Likely Y Binary are added. To see how these response probabilities are calculated, in the Columns panel, next to each column, double-click the Formula icon .