title: How do I achieve consistency in output in eps and pdf terminals in gnuplot?
body: <p>I am trying to get somewhat consistent output between eps and pdf terminals in gnuplot.  The trouble is that they seem to understand size units differently; the same specified size in inches will result in a much larger font size for the pdf output:</p>
  
  <pre><code>set terminal postscript eps enhanced colour size 10in,8in font 'Arial-Bold,14'
  set output 'my_eps.eps'
  set title 'My plot'
  plot sin(x) notitle
  
  set terminal pdfcairo size 10in,8in font 'Arial-Bold,14'
  set output 'my_pdf.pdf'
  replot
  </code></pre>
  
  <p>The text in the .pdf is much larger and the graph is cramped.  However, if I change the size units of the eps to cm:</p>
  
  <pre><code>set terminal postscript eps enhanced colour size 10cm,8cm font 'Arial-Bold,14'
                                                   ########
  set output 'my_eps.eps'
  set title 'My plot'
  plot sin(x) notitle
  
  set terminal pdfcairo size 10in,8in font 'Arial-Bold,14'
  set output 'my_pdf.pdf'
  replot
  </code></pre>
  
  <p>The outputs look the same (to within some margin errors) with the wrong units.  Is this a coincidence?  What's going on here?</p>
  
  <p>This was tested for Gnuplot 4.4 (patchlevel 3) Ubuntu 11.10.</p>
  
  <p>(I know I could use some utility to convert between eps and pdf so they would be the same, but I'd like to understand what's going on in gnuplot.)</p>