<p>In the LTPDA toolbox you have several way to define transfer functions depending on the mathematical representation you want to use</p> <ul> <li><a href="pzmodel.html">Pole/zero representation</a> </li> <li><a href="parfrac.html">Sum of partial fractions representation</a></li> <li><a href="rational.html">Rational representation</a></li> </ul>