User`s guide

What Is Frequency Response? ....................... 8-32
How Frequency Response H elps to Validate Models
..... 8-33
What Does a F requency-Response Plot Show ?
.......... 8-34
How to Plot Bode Plots Using the GUI
................ 8-35
HowtoPlotBodeandNyquistPlotsattheCommand
Line
.......................................... 8-38
Creating Noise-Spec tr um P lots
..................... 8-40
Supported Models
................................. 8-40
What Does a Noise Spectrum Plot Show?
.............. 8-40
Displaying the Confidence Interval
................... 8-41
HowtoPlottheNoiseSpectrumUsingtheGUI
......... 8-42
How to Plot the Noise Spectrum at the Command Line
... 8-45
Using Pole-Zero Plots to Validate Models
............ 8-47
Supported Models
................................. 8-47
What Does a Pole-Zero Plot Show?
................... 8-47
How to Plot Model Poles and Zeros Using the GU I
...... 8-48
How to Plot Poles and Zeros at the Command Line
...... 8-50
Reducing Model Order Using Pole-Zero Plots
........... 8-51
Using Nonlinear ARX Plots to Validate Models
....... 8-52
About N onlinear ARX Plots
......................... 8-52
How to Plot N onlinear ARX Plots Using the GUI
........ 8-52
Configuring the Nonlinear ARX Plot
.................. 8-53
Axis Limits, Legend, and 3-D Rotation
................ 8-54
How to Plot Nonlinear ARX Plots at the Command Line
.. 8-55
Using Hammerstein-Wiener Plots to Validate
Models
......................................... 8-56
About Hammerstein-Wiener Plots
.................... 8-56
How to Create Hammerstein-Wiener Plots in the G UI
... 8-56
How to Plot Hammerstein-Wiener Plots at the Command
Line
.......................................... 8-58
Plotting N on l in ea r Block Characteristics
.............. 8-58
Plotting Linear Block Characteristics
................. 8-59
Using Akaike’s Criteria to Validate Models
........... 8-61
Definition of FPE
.................................. 8-61
Computing FPE
................................... 8-62
Definition of AIC
.................................. 8-62
Computing AIC
................................... 8-63
xviii Contents