title: Plotting on Gnuplot - skipping lines
body: <p>I have some problems with reading my file in Gnuplot.
  For example, I have a file like this:</p>
  
  <pre><code>___________________________________________
  '#current' 
  month followed retweeted mentioned replied 
  
  Jan 395 29 35 28 
  
  Feb 380 28 32 31 
  
  '#previous' 
  month followed retweeted mentioned replied 
  
  Jan 381 30 38 32 
  
  Feb 378 25 42 30 
  
  Mar 374 28 46 40
  ______________________________________________________
  </code></pre>
  
  <p>I need to read only the second block, which starts with tag "#previous". How can I do it? I tried this command:</p>
  
  <pre><code>plot "data.txt" index 'previous' using 3:xticlabel(1) axes x1y1 with lines linecolor rgbcolor "red",\
  </code></pre>
  
  <p>but it doesn't work. Any ideas?</p>