title: JQPlot auto refresh chart with dynamic ajax data
body: <p>I want to update the chart drawn by jqPlot sequentially in time intervals.</p>
  
  <p>My use case is such that the AJAX call returns only a single value. For e.g.:</p>
  
  <pre><code>1st AJAX call: 20
  2nd AJAX call: 30
  3rd AJAX call: 40
  4th AJAX call: 32
  </code></pre>
  
  <p>So i want to make plot the graph like:</p>
  
  <pre><code>First: only 20
  Second: 20,30
  Third: 20,30,40
  Fourth: 20,30,40,32
  </code></pre>
  
  <p>Can we extract already plotted data in JQPlot and then append this new data set and redraw the graph??</p>
  
  <p>Can any one help please??</p>