title: Convert Letter to Number
body: <p>I'm new to matlab ... I simply would like to convert letter to numbers such that:</p>
  
  <pre><code>A=1
  B=2
  C=3
  </code></pre>
  
  <p>all my numbers are capital case. Off course, I could define constant for each char, but is there a shorter way?</p>
  
  <p>Thanks!</p>