| Signal Processing Toolbox | |
Zero-Pole Analysis
The zplane function plots poles and zeros of a linear system. For example, a simple filter with a zero at -1/2 and a complex pole pair at 
and 
is
To view the pole-zero plot for this filter you can use
or, for access to additional tools, use fvtool. First convert the poles and zeros to transfer function form, then call fvtool,
and click the Pole/Zero Plot toolbar button 
on the toolbar or select Pole/Zero Plot from the Analysis menu to see the plot.
For a system in zero-pole form, supply column vector arguments z and p to zplane:
For a system in transfer function form, supply row vectors b and a as arguments to zplane:
In this case zplane finds the roots of b and a using the roots function and plots the resulting zeros and poles.
See Linear System Models for details on zero-pole and transfer function representation of systems.
| | Delay | Linear System Models | |
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