title: How to set the current date in the gnuplot title
body: <p>It's possible to set the current date in the gnuplot title?</p>
  
  <p>Something like...</p>
  
  <p>set title "date of execution = <code>datetime()</code>"</p>
  
  <p>Thanks in advance.</p>
  
  <p>Alexandre.</p>