title: Matlab, an error after using fitctree function
body: <p>I am trying to construct a decision tree. I tried using the <code>fitctree</code> function and wrote:</p>
  
  <pre><code>ctree = fitctree(TrainingX,TrainingY);
  </code></pre>
  
  <p>such that <code>TrainingX</code> is the input matrix and <code>TrainingY</code> is the target matrix. An error appears saying that:</p>
  
  <blockquote>
    <p>Undefined function <code>'fitctree'</code> for input arguments of type <code>'double'</code>.</p>
  </blockquote>
  
  <p>I don't know what is the problem and what should I do to solve it. Could you please help me?</p>