title: An error arises in Matlab: Undefined function or variable 'removeStopWords'
body: <p>I am using Matlab R2017B with text analytics toolbox installed(I have checked by searching get add-ons). I have written a simple function which is the following:</p>
  
  <pre><code>function x=test()
      s='i am a boy and u r a grl';
      disp(removeStopWords(s));
  end
  </code></pre>
  
  <p>And it shows the following error:</p>
  
  <pre><code>Undefined function or variable 'removeStopWords'.
  </code></pre>
  
  <p>Then, I have tried following in command window:</p>
  
  <pre><code>which removeStopWords
  </code></pre>
  
  <p>and it shows</p>
  
  <pre><code>'removeStopWords' not found.
  </code></pre>
  
  <p>Would you please shed light on this issue explaining why is this happening?</p>
  
  <p>Thanks,</p>