User`s guide

Refining Nonlinear Black-Box Models
4 Click E stimate to refine the model.
5 Validate the new model, as described in Chapter 8, “Model Analysis”.
Tip To continue refining the model directly from the Estimation tab, select
the Us e last estimate d model as initial mo del for the n ex t e stim at ion
check box, and click Estim ate. This action automatic al ly selects the m ost
recent model in the Initial model list in the Model Type tab.
How to Refine Nonlinear Black-Box Models at the
Command Line
If you are w orking at the command line, you can use pem to refine nonlinear
black-box models.
The general syntax for refining initial models is as follows:
m = pem(data,init_model)
pem
uses the properties o f the initial model unle ss you specify different
properties. F or more information about specifying model properties directly in
the estimator, see “Specifying Model Properties fo r Estimation” on page 2-16.
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