title: Gnuplot matching tics
body: <p>I'm trying to plot data with two different x-axes with the following code:</p>
  
  <pre><code>reset
  # Settings
  set grid
  set x2tics
  set xtics nomirror
  
  plot './data/N.dat' u ($1*c1)/f_offset:($2*c2) w lp ls 1,\
   '' u ($1*c1)/f_offset:($3*c2) w lp ls 2,\
   '' u ($1*c1):($2*c2) w p ps 0 notitle axis x2y1
  </code></pre>
  
  <p>where c1,c2 and f_offset are constants. The last line is there only to get the second set of ticks. This works fine but the ticks on x and x2 axes are not aligned. It is a minor thing but it does look weird with the grid, which is aligned to the first axis. Is there a simple solution I'm missing or do I have to set the values manually?</p>