title: GnuPlot: stacked histogram causes hovering bars
body: <p>since two days I am trying to solve this problem. The bars of this stacked histogram are not printed above each other. They are floating freely around.</p>
  
  <p>Secondly, I only want to print any 5th xtic-label. I am using GnuPlot v 4.6 patchlevel 6.<a href="http://i.stack.imgur.com/5RO7I.png" rel="nofollow">hovering bars in stacked bargraph</a> </p>
  
  <p>Here are the first data rows (generated with libreoffice):</p>
  
  <pre><code>05.06,-,-,1
  06.06,3,-,0
  07.06,12,-,3
  08.06,0,5,4
  09.06,7,2,0
  10.06,86,2,1
  11.06,31,4,1
  12.06,17,1,0
  01.07,1,7,1
  </code></pre>
  
  <p>Here comes the command set:</p>
  
  <pre><code>gnuplot&gt; set datafile separator ','
  gnuplot&gt; set style data histogram
  gnuplot&gt; set style histogram rowstacked
  gnuplot&gt; set style fill solid border -1
  gnuplot&gt; set xlabel "Zeit"
  gnuplot&gt; set ylabel "Anzahl"
  gnuplot&gt; set yrange [0:250]
  gnuplot&gt; plot 'test.csv' using 2:xtic(1) title "Menge A",'' 
  gnuplot&gt; using 3:xtic(1) title "Menge B",''
  gnuplot&gt; using 4:xtic(1) title "Menge C"
  </code></pre>