Plot Poles and Zeros at the Command Line

You can create a pole-zero plot for linear identified models using the iopzmap and iopzplot commands.

To display confidence intervals for a specified number of standard deviations, use the following syntax:

h = iopzplot(model); 

where sd is the number of standard deviations of a Gaussian distribution. For example, a confidence value of 99% for the nominal model curve corresponds to 2.58 standard deviations.


Plots zeros and poles of the model on the S-plane or Z-plane for continuous-time or discrete-time model, respectively.

To plot the poles and zeros of the model sys, use the following command:


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