| Model Browser User's Guide |
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Global Level: Model-Specific Tools
All nine left buttons (up to Box-Cox Transform) appear for all response feature models and one-stage models. See Global Level: Toolbar for details on these buttons. The right buttons change according to model type.
Linear Model and Multiple Linear Models
- Stepwise -- This opens the Stepwise Regression window, where you can view the effects of removing and restoring model terms on the PRESS statistic (Predicted Error Sum of Squares), which is a measure of the predictive quality of a model. You can also use Min PRESS to remove all at once model terms that do not improve the predictive qualities of the model. See Stepwise Regression Techniques for further discussion of the statistical effects of the Stepwise feature.
- Design Evaluation - Opens the Design Evaluation tool, where you can view properties of the design. See Design Evaluation Tool.
- Prediction Error Surface - Opens the Prediction Error Variance Viewer. See Prediction Error Variance Viewer.
Free-Knot Spline Models
Free knot spline models do not have any model-specific tools, just the standard View Model, Box-Cox Transform, and Build Models.
Radial Basis Function Models
- Update Fit refits the RBF widths and centers. See Fitting Routines in the Radial Basis Functions chapter.
- View Centers opens a dialog where you can view the position of the radial basis function's centers graphically and in table form.
- Prune opens the Number of Centers Selector where you can minimize various error statistics by decreasing the number of centers. See Prune Functionality.
- Stepwise opens the Stepwise Regression window.
- Design Evaluation - Opens the Design Evaluation tool, where you can view properties of the design. See Design Evaluation Tool.
- Prediction Error Surface - Opens the Prediction Error Variance Viewer.
Hybrid RBFs have the same toolbar buttons as linear models.
MLE Models
This toolbar appears when you select any response feature that is an MLE model (purple icon). See Global Level for other functionality in this view.
At this point the New child node and Box-Cox buttons are disabled.
- Recalculate MLE returns to the MLE dialog, where you can perform more iterations to try to refine the MLE model fit. See MLE for more details.
Neural Networks
Neural net models have the View Model, Build Models, and Update Fit tools.
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