title: Use gnuplot to plot sqlite database
body: <p>I have a sqlite database that contains basic weather information in the following format:</p>
  
  <pre><code>temp1 temp2 pressure humidity
  22    23    1024     40
  24    25    1027     45
  25    26    1020     62
  18    15    1019     80
  </code></pre>
  
  <p>how can I plot this data using <code>gnuplot</code>? Do I have to re-arrange the data before being able to plot it?</p>