title: How to display a stacked barchart in Gnuplot?
body: <p>I have a data file that looks a bit like this:</p>
  
  <pre><code>A 0.2  0.5
  B 0.65 0.8
  C 0.4  0.2
  </code></pre>
  
  <p>i.e., it contains three columns where the first column contains labels and the other two columns float values. Columns are separated by spaces.</p>
  
  <p>I'd like to plot this in a way that the labels appear as tics on the x-axis while the columns are plotted as two differently colored barcharts on top of each other.</p>
  
  <p>How can I achieve this using Gnuplot?</p>