This enables you to change the linear parameters in the current nonlinear model by adding or removing terms. The Options settings of the nonlinear menu control what output is produced when the model is updated. After fitting a sequence of models you can use the Accumulated setting of Further output to produce a summary of the various changes you have made.
Terms
Lists the linear terms in the maximal model (variates or factors, or interactions) which can be changed in the current model. You can select one or more terms.
Action buttons
| Add | The specified terms are added to the current model. The current model is updated to contain these terms. |
| Drop | The specified terms are removed from the current model. They must be present in the model currently fitted. The current model is updated to reflect terms which have been dropped. |
| Switch | Terms that are present in the model are dropped, and terms that are not present are added. The current model is updated to reflect the changes. |
| Try |
The effect of changing the model is reported, for each of the terms in turn. Terms that are present in the model are dropped, and terms that are not present are added. However, the current model is retained as before. You can produce a brief summary of potential changes by selecting Display changes. You can control whether the previously chosen display options are printed in the analysis by setting the Display default options check box. |
See also
- ADD, DROP,
- SWITCH and TRY directives for changing terms in a model.
- Nonlinear Models menu
- Save Options
- Change Model
- Nonlinear Models Generate Expression
- Nonlinear Models Parameter Settings
- Nonlinear Models Reorder Expression List
- Nonlinear Quantile Regression menu
- Standard Curves for information on general options and other curves
- Standard Curves with Correlated Errors menu.
- Examples of Standard Nonlinear Curves
- Exponential Curves
- Fourier Curves
- Gaussian Curves
- Growth Curves
- Rational Curves
- FITCURVE directive
- FITNONLINEAR directive
- FIT directive
- RQNONLINEAR procedure
- MINIMIZE procedure
- SIMPLEX procedure