title: Creating a dropdown menu in inputdlg box
body: <p>I have this Matlab code:</p>
  <pre><code>prompt = {'Enter period:','Enter frequency:'};
  dlgtitle = 'Input';
  dims = [1 35];
  definput = {'3000','10'};
  answer = inputdlg(prompt,dlgtitle,dims,definput)
  </code></pre>
  <p>I want to create a dropdown menu for period only with specific values.
  How can I do it?</p>