title: when drawing a filled circle, gnuplot gives different output between x11 terminal and latex terminal, why?
body: <p>I switched from tikz to gnuplot for drawing math diagrams recently. I find them very different.</p>
  
  <p>I want to draw a circle, so I created a .gpi file:</p>
  
  <pre><code>set terminal latex
  set out 'gp.tex'
  set xrange [-5:5]
  set yrange [-5:5]
  set object 1 circle at 0,0 size char 1 fillcolor rgb "black" fillstyle solid
  plot NaN
  set out
  set terminal x11
  plot NaN
  </code></pre>
  
  <p>And I loaded it in gnuplot.</p>
  
  <p>The circle in <code>x11</code> terminal is filled, as expected:
  <a href="http://i.imgur.com/xDmlTa4.png" rel="nofollow">http://i.imgur.com/xDmlTa4.png</a></p>
  
  <p>But the one compiled from <code>gp.tex</code> is a hollow circle:
  <a href="http://i.imgur.com/7LNzvmW.png" rel="nofollow">http://i.imgur.com/7LNzvmW.png</a></p>
  
  <p>Why? How can I produce a filled circle in the tex file as well?</p>