To launch the Model Comparison platform, select Analyze > Predictive Modeling > Model Comparison.

For a categorical response with k levels, most model fitting platforms save k columns to the data table, each predicting the probability for a level. All k columns need to be specified as Y, Predictors. For platforms that do not save k columns of probabilities, the column containing the predicted response level can be specified as a Y, Predictors column.

If you do not specify any Y, Predictors columns, JMP uses the prediction formula columns in the data table that have either the Predicting or Response Probability column property.

The other role buttons are common among JMP platforms. See Cast Selected Columns into Roles Buttons in the Using JMP book for details.