title: Plotting a graph in Linux (Ubuntu)
body: <p>I have a file containing large amount of data (3.5GB, about 100M records, one repord per line). Format of a record is: <code>&lt;time&gt; &lt;label&gt; &lt;magnitude&gt;</code>. Format of time is: <code>HH:mm:ss.000</code></p>
  
  <p>I want to get a plot with points from file put on it (axis X: time, axis Y: magnitude, point color depends on label [not necessary but will be very good]).</p>
  
  <p>What it the ways of plotting such a graph?</p>