title: Matlab: ezplot two functions in one graph
body: <p>I did a Newton interpolation and defined it via <code>cotNewton = @(x)[...]</code>, where <code>[...]</code> is some function and is too large to post. I would like to compare it with <code>cot(x)</code>, so I did</p>
  
  <pre><code>syms x;
  figure; 
  hold on; 
  ezplot(cot(x)); 
  ezplot(cotNewton);
  </code></pre>
  
  <p>However, the graph I get only shows <code>cotNewton</code>. What am I doing wrong? Thank you!</p>