User`s guide

Identifying Low-Order Transfer Functions (Process M odels)
6 In the Distu rbance Model list, select one of the available options. For
more information about each option, see “Options for the Disturbance
Model Structure” on page 3-37.
7 In the Focus list, select how to weigh the relative importance of the fitat
different frequencies. For more information about each option, see “Options
for Frequency-Weighing Focus” on page 3-38.
8 In the Initial state list, specify how you want the algorithm to treat initial
states. For m ore inform ation about the available options, see “Options for
Initial States” on page 3-39.
Tip If you get a bad fit, you might try setting a specific method for handling
initial states, rather than choosing it automatically.
9 In the Covariance list, select Estimate if you want the algorithm to
compute parameter uncertainties. Effects of such uncertainties are
displayed on plots as model con fidence regions.
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