title: obtain number from string in matlab
body: <p>I have an array of strings:</p>
  
  <pre><code>dd = {'L','temp1','temp23','Reas'};
  </code></pre>
  
  <p>I would like to extract the numbers from the strings that contain any numbers (if that makes sense). So, the solution for this question should be 1 and 23.</p>
  
  <p>How can I achieve this in matlab? </p>