title: Highcharts - Dyanmic graph with no initial data
body: <p>If you open this JSFiddle with the dynamic spline update it loads the series with 20 points before it starts updating every second.</p>
  
  <p><a href="http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/highcharts/demo/dynamic-update/">Example</a></p>
  
  <p>I don't want to display any initial data and let the interval add the points as they come in.</p>
  
  <p>So I change:</p>
  
  <pre><code>series: [{
              name: 'Random data',
              data: (function() {
                  // generate an array of random data
                  var data = [],
                      time = (new Date()).getTime(),
                      i;
  
                  for (i = -19; i &lt;= 0; i++) {
                      data.push({
                          x: time + i * 1000,
                          y: Math.random()
                      });
                  }
                  return data;
              })()
          }]
  </code></pre>
  
  <p>to</p>
  
  <pre><code>series: [{
              name: 'Random data',
              data: []
          }]
  </code></pre>
  
  <p>But it doesnt add the points. Is there something I am missing?</p>