title: Adding data to Highcharts after initial rendering
body: <p>I'm using Highcharts and initializing the data using;</p>
  
  <pre><code>var graph = Highcharts.chart('container', {
  ................
      series: [{
          color: 'red',
          data: [[5, 2],  [800, 2], [801, 1],[802, 3],[803, 2],[804, 2],[1200, 3]]
      },
  .............
  }
  </code></pre>
  
  <p>The problem I have is when I want to add more data dynamically, after rendering the initial chart.</p>
  
  <p>In this case I'm using the update;</p>
  
  <pre><code>graph.update(
  {
      series: [{
          color: 'blue',
          data: [[100, 2],  [101, 2], [102, 1] ]
      },
  });
  </code></pre>
  
  <p>And this works but it replaces the entire data set.
  So, how should I use the update() function to add points and not replace them?</p>
  
  <p>I saw people are using other functions such as addPoint() and setData() but I couldn't make them work properly...
  Thanks in advance
  Gus</p>