title: How to automatically replot a graph every few seconds in gnuplot?
body: <p>I have a data file <code>a.dat</code> that is updated every few seconds.  I wish to plot it in gnuplot every few seconds to see the changes</p>
  
  <pre><code>plot "a.dat"
  </code></pre>
  
  <p>What is the easiest way to do it?  Thanks.</p>