title: Check if string contains any numbers in MATLAB
body: <p>How do we check if the string contains any numbers?</p>
  
  <p>The best way to check if the string contains all letters is to use <code>isletter</code> command but how to go one step further and check if any char in the string is a number?</p>
  
  <p>One way is to convert the string to an array of Chars and cross check if the ascii values belongs to numerics. Is there a simpler way to do this in MATLAB?</p>
  
  <p>Example string: <code>67 Cliston St</code></p>