[imedia]

<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.min.js"></script>

<div id="myfirstchart" style="height: 250px;"></div>
<script>
new Morris.Line({
  // ID of the element in which to draw the chart.
  element: 'myfirstchart',
  // Chart data records -- each entry in this array corresponds to a point on
  // the chart.
  data: [
    { year: '2008', value: 20 },
    { year: '2009', value: 10 },
    { year: '2010', value: 5 },
    { year: '2011', value: 5 },
    { year: '2012', value: 20 }
  ],
  // The name of the data record attribute that contains x-values.
  xkey: 'year',
  // A list of names of data record attributes that contain y-values.
  ykeys: ['value'],
  // Labels for the ykeys -- will be displayed when you hover over the
  // chart.
  labels: ['Value']
});
options.data = [
    { year: '2013', value: 25 },
    { year: '2009', value: 10 },
    { year: '3010', value: 50 },
    { year: '2051', value: 4 },
    { year: '2012', value: 20 }
  ];
 
new Morris.Line( options );
</script>

Видите нет переопределения