Displaying Errors

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Introducing Error Displays Feature Error Data Prediction Error Data

Introducing Error Displays

There are two different error displays available in the surface display options for primary and secondary surfaces and surface shading:

• Error between the model and the strategy (See Feature Error Data following.)

• Prediction error of the model (See Prediction Error Data.)

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Feature Error Data

When you are viewing a feature, this displays the error between the strategy and the model.

To display the error, select Error (strategy-model) from the drop-down menu for primary or secondary surface. You can also choose to shade your primary surface with the error by using the Surface 1 Shading menu.

To view the error statistics, select View > Statistics. This opens a dialog box with a list of the summary statistics for the error between model or feature.

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Prediction Error Data

If the model is imported from the Model Browser, it is possible to display the prediction error (PE) data.

Prediction Error Variance (PEV) is a very useful way to investigate the predictive capability of your model. It gives a measure of the precision of a model's predictions. PEV can also be examined in the Model Browser, both in the Prediction Error Variance Viewer and to shade surfaces in the Model Selection and Model Evaluation views. Here you can examine the PEV of designs and models. When you export the model to CAGE you can see this data in the Surface Viewer in the Prediction Error option. See the Model Browser GUI Reference and Technical Documents for details about the calculation of Prediction Error.

Viewing the Prediction Error

Select Prediction Error from the drop-down display menus for primary or secondary surfaces. You can also choose Prediction Error to shade your primary surface. As with all other plots, you can view the statistics for the Prediction Error displayed by selecting View > Statistics. The mean, standard deviation, and so on are calculated over the range specified in the variable value boxes.

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Making Movies

Printing and Exporting the Display

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