title: Plot all files in a directory simultanously with gnuplot?
body: <p>I want to do something similar to this question: <a href="https://stackoverflow.com/q/11092608/855050">gnuplot : plotting data from multiple input files in a single graph</a>.</p>
  
  <p>I want to plot simultaneously <em>all</em> the files in a directory, without having to explicitly write their names. The column numbers are the same for all the files. What can I do?</p>
  
  <p>Doing <code>plot for [file in *] file u 3:2</code> doesn't work.</p>
  
  <p>Also, I don't want each file to have a different legend. All points from all files should be treated the same, as if they all came from a single file.</p>