title: MATLAB: What is the difference between pzmap and pzplot?
body: <p>What is the difference between <strong><em>pzmap</em></strong> and <strong><em>pzplot</em></strong> ?? <em>Both are used to plot the poles and zeros of the LTI system.</em> </p>
  
  <p>For example:</p>
  
  <p>Lets say I define my <em>transfer function</em> via <strong>tf</strong> <em>command</em>: </p>
  
  <p><code>t = tf([2 5],[1 3 2])</code></p>
  
  <p><a href="https://i.stack.imgur.com/THG8X.png" rel="nofollow noreferrer">Transfer Function</a></p>
  
  <p><strong><em>Continuous-time transfer function.</em></strong></p>
  
  <p>But when I try to plot the zero-pole-map via <em>pzmap</em>, I got:</p>
  
  <p><code>pzmap(t)</code></p>
  
  <p>And with <em>pzplot</em>, I got the same plot:</p>
  
  <p><code>pzplot(t)</code></p>
  
  <p><a href="https://i.stack.imgur.com/763ZU.jpg" rel="nofollow noreferrer">Plot with <strong>pzmap</strong> and <strong>pzplot</strong></a></p>
  
  <p>Both are the same plots. What is the difference then between <strong>pzmap</strong> and <strong>pzplot</strong> ??</p>