add new dataset for line chart - Javascript Chart.js

Javascript examples for Chart.js:Line Chart

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Description

add new dataset for line chart

Demo Code

ResultView the demo in separate window 

<html>
   <head> 
      <title>line chart with ChartJS</title> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://rawgit.com/nnnick/Chart.js/v1.0.2/Chart.min.js"></script> 
      <script type="text/javascript">
    window.onload=function(){//from  w ww .ja va 2s  .  co  m
var ctx = document.getElementById("myChart").getContext("2d");
var data = {
  labels: ["January", "February", "March", "April", "May", "June", "July"],
  datasets: [
    {
      label: "My First dataset",
      fillColor: "rgba(220,220,220,0.2)",
      strokeColor: "rgba(220,220,220,1)",
      pointColor: "rgba(220,220,220,1)",
      pointStrokeColor: "#fff",
      pointHighlightFill: "#fff",
      pointHighlightStroke: "rgba(220,220,220,1)",
      data: [65, 0, 80, 81, 56, 85, 40]
    },
    {
      label: "My Second dataset",
      fillColor: "rgba(151,187,205,0.2)",
      strokeColor: "rgba(151,187,205,1)",
      pointColor: "rgba(151,187,205,1)",
      pointStrokeColor: "#fff",
      pointHighlightFill: "#fff",
      pointHighlightStroke: "rgba(151,187,205,1)",
      data: [28, 48, 40, 19, 86, 27, 90]
    },
    {
      label: "My Third dataset",
      fillColor: "rgba(151,205,187,0.2)",
      strokeColor: "rgba(151,205,187,1)",
      pointColor: "rgba(151,205,187,1)",
      pointStrokeColor: "#fff",
      pointHighlightFill: "#fff",
      pointHighlightStroke: "rgba(151,205,187,1)",
      data: [90, 28, 48, 40, 19, 86, 27]
    }
  ]
};
var dataArrays = [];
for (var i = 1; i < data.datasets.length; i++) {
    dataArrays.push(data.datasets[i].data);
    data.datasets[i].data = data.datasets[i].data.map(function() {
        return 0
    });
}
var myLineChart = new Chart(ctx).Line(data, {
  animationEasing: 'linear',
  onAnimationComplete: function () {
    if (dataArrays.length !== 0) {
      var index = myLineChart.datasets.length - dataArrays.length;
      myLineChart.datasets[index].points.forEach(function (point, i) {
        point.value = dataArrays[0][i];
      });
      myLineChart.update();
      dataArrays.shift();
    }
  }
});
    }

      </script> 
   </head> 
   <body> 
      <canvas id="myChart" height="300" width="800"></canvas>  
   </body>
</html>

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