<p>
  	Pole/zero modelling is implemented in the LTPDA Toolbox using two classes: a 
    <tt>pz</tt> (pole/zero) class, and a pole/zero model class, <tt>pzmodel</tt>.
  </p>
  <p>
	The following pages introduce how to produce and use pole/zero models in the LTPDA environment.
	<ul>
		<li><a href="pzmodel_model.html">Building a model</a></li>
		<li><a href="pzmodel_gui.html">Model helper GUI</a></li>
		<li><a href="pzmodel_filter.html">Converting models to IIR filters</a></li>
	</ul>
  </p>