title: Replace special characters by equivalent
body: <p>How do I replace the following special characters by their equivalent?</p>
  
  <p>Vowels: ÁÉÍÓÚáéíóú by AEIOUaeiou respectively. And letter Ñ by N.</p>
  
  <p>The expression:</p>
  
  <pre><code>str = regexprep(str,'[^a-zA-Z]','');
  </code></pre>
  
  <p>Will remove all characters non in alphabet, but how do I replace with something equivalent like shown above?</p>
  
  <p>Thanks</p>