title: Add terminator string with dlmwrite
body: <p>I have write this:</p>
  
  <pre><code>dlmwrite(fName,IND,'-append',...  %// Print the matrix
       'delimiter','\n', 'newline','pc');
  </code></pre>
  
  <p>The output is this:</p>
  
  <pre><code>23 46 56 67
  </code></pre>
  
  <p>How should I modify the dlmwrite function to have an output like this:</p>
  
  <pre><code>23, 46, 56, 67;
  </code></pre>