title: Position xtics between bars
body: <p>I have a dataset</p>
  
  <pre><code>200 45000
  600 260000
  2000 680000
  18000 2800000
  </code></pre>
  
  <p>I generated this by processing other data (set like <code>{(x0, y0), (x1, y1),..}</code>). On the first row in the first column is the low quartile of <code>x</code> and in the second column is sum of <code>y</code>s corresponding to data with <code>x_0 &lt; 200</code>. In the second column it is similar but the first column is median and second column is the mentioned sum for <code>200 &lt; x_0 &lt;= 600</code>. Third is similar (just with high quartile), fourth has the maximum value of <code>x</code> in the first column.</p>
  
  <p>I want to render a box plot similar to the one below but the xtics should be right between the borders of the boxes (so each box would be between two xtics). How can I do that? The manual page for "set xtics" didn't help.</p>
  
  <p><img src="https://i.stack.imgur.com/SdGyy.png" alt="box plot"></p>
  
  <p>This was generated by this code (few unimportant style settings not shown):</p>
  
  <pre><code>plot 'data/example.dat' using 1:2:xtic(1) with boxes
  </code></pre>
  
  <p>There is a related question <a href="https://stackoverflow.com/questions/18797472/gnuplot-put-xtics-between-bars">Gnuplot put xtics between bars</a> but I don't think I can apply that since I want my boxes to keep their width (although I need to somehow modify it a bit so that 200 and 600 don't overlap).</p>