title: Gnuplot Multiple files in one Plot
body: <p>I use gnuplot for plotting data from 4 files on a single graph (png).</p>
  
  <p><strong>I get the 4 plots as different colored lines.</strong></p>
  
  <p>I want them to be <strong>of different line types</strong> so that the plot can be easily <strong>recognized in a black and white print out</strong>.</p>
  
  <p>How to do that ? Many thanks for your help.</p>
  
  <p>So what I want is <a href="http://gnuplot.sourceforge.net/demo/lines_arrows.html" rel="nofollow">http://gnuplot.sourceforge.net/demo/lines_arrows.html</a> : Second figure. In Gnuplot, I get the plots as different colored lines.</p>