User`s guide

8 Model Analysis
most-delayed and least-delayed inpu t. For example, there two poles and one
zero in the follo wing ARX model:
yt yt T yt T
ut ut T
() . ( ) . ( )
.() .( )
−−+−=
+−
15 07 2
09 05
The following figure shows a sample pole-zero plot of the model w ith
confidence intervals.
x indicate poles and o indicate zeros.
How to Plot Model Poles a nd Zeros Using the GUI
To create a p o le-zero plot for p arametric linear models in the Sys tem
Identification T ool GUI, select the Zeros and poles check box in the Model
Views area. For gene ral information about creating and working with plots,
see “Working with Plots in the System Identification Tool GU I” on page 12-15.
To include or exclude a model on the plot, click the corresponding model icon
in the System Identification Tool G U I. Active models display a thick line
inside the Model Board icon.
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