title: How to push datasets dynamically for chart.js (bar chart)?
body: <p>Im using chartjs (bar chart) to display some data.
  Im trying to dynamically add data to <strong>datasets</strong> array but its not working.</p>
  
  <p>for example, lets say I have 2 objects in datasets array, and I dynamically  creating this object and trying to push him into datasets (from Chrome console)
  after the page loaded and chart is already up.</p>
  
  <pre><code>var e = {
                  fillColor : "#efefef",
                  strokeColor : "#efefef",
                  highlightFill: "#efefef",
                  highlightStroke: "#efefef",
                  data : [randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor(),randomScalingFactor()]
              }
  </code></pre>
  
  <p>and then</p>
  
  <pre><code>barChartData.datasets.push(e)
  </code></pre>
  
  <p>I also tried to do <code>window.myBar.update()</code>
  but again nothing happend.</p>
  
  <p>Do you know this issue? 
  Thanks,</p>