User`s guide

Computing Model Uncertainty ...................... 8-64
Why Analyze Model Uncertainty?
.................... 8-64
What Is Model Covarianc e?
......................... 8-64
Viewing Model Uncertainty Information
............... 8-65
Troubleshooting Models
............................ 8-67
About Trouble shooting Models
....................... 8-67
Model O rder Is Too H igh or Too Low
.................. 8-67
Nonlinearity Estimator Produces a P oor Fit
............ 8-68
Substantial Noise in the System
..................... 8-69
Unstable Models
.................................. 8-69
Missing Input Variables
............................ 8-70
Complicated Nonlin e arities
......................... 8-71
Next Step s After Getting an Accurate Model
......... 8-72
Simulation and Prediction
9
Simulating Versus P redicting Output ............... 9-2
Simulation and Prediction in the GUI
............... 9-4
Example – Simulating Model Output with Noise at the
Command Line
.................................. 9-5
Example – Simulating a Continuous-Time State-Space
Model at the Command Line
...................... 9-6
PredictingModelOutputattheCommandLine
...... 9-7
Specifying Initial S tates
............................ 9-8
When to Specify Initial States
....................... 9-8
Setting Initial States to Zero
........................ 9-8
Setting Initial States to E quilibrium Values
............ 9-9
Estimating Initial States from the Data
............... 9-9
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