javascript - Google Charts with 3 columns -


i want create google chart has 3 columns. want add 2 sets data it. please refer js code understanding.

also can check https://jsfiddle.net/dt6syt2w/2/

i'm looking forward getting solution user : asgallant

google.load('visualization', '1', {packages: ['corechart', 'line']}); google.setonloadcallback(drawtrendlines);      function drawtrendlines()  {     var data1 = new google.visualization.datatable();     data1.addcolumn('number', 'x');     data1.addcolumn('number', 'normal value 1');     data1.addcolumn('number', 'peak value 1');        data1.addrows([          [0, 0, 0],    [1, 10, 15],   [2, 23, 25],  [3, 17, 26],   [4, 18, 30],  [5, 9, 20],         [6, 11, 25],   [7, 27, 30]     ]);      var data2 = new google.visualization.datatable();     data2.addcolumn('number', 'x');         data2.addcolumn('number', 'normal value 2');     data2.addcolumn('number', 'peak value 2');      data2.addrows([         [1, 1, 1],    [2, 20, 25],   [3, 25, 30],  [4, 23, 35],   [5, 28, 36],  [6, 19, 40], [7, 80, 100]     ]);          var joineddata = google.visualization.data.join(data1, data2, 'full', [[0, 0, 0]], [1], [1], [1]);      var options = {     haxis: {       title: 'time'     },     vaxis: {       title: 'popularity'     }   };    var chart = new google.visualization.linechart(document.getelementbyid('chart_div'));   chart.draw(joineddata, options); }

just have fix join() call: 

var joineddata = google.visualization.data.join(data1, data2, 'full', [[0, 0]], [1, 2], [1, 2]);

the [[0, 0]] compares keys @ column position 0 each datatable passed in. [1, 2] supplied next arguments join columns @ position 1 , 2 in each data table. since columns named normal value 1, peak value 1, normal value 2, , peak value 2 @ positions, data comes there. 

google.load('visualization', '1', {    packages: ['corechart', 'line']  });  google.setonloadcallback(drawtrendlines);    function drawtrendlines() {    var data1 = new google.visualization.datatable();    data1.addcolumn('number', 'x');    data1.addcolumn('number', 'normal value 1');    data1.addcolumn('number', 'normal value 2');      data1.addrows([      [0, 0, 0],      [1, 10, 15],      [2, 23, 25],      [3, 17, 26],      [4, 18, 30],      [5, 9, 20],      [6, 11, 25],      [7, 27, 30]    ]);      var data2 = new google.visualization.datatable();    data2.addcolumn('number', 'x');    data2.addcolumn('number', 'peak value 1');    data2.addcolumn('number', 'peak value 2');      data2.addrows([      [1, 1, 1],      [2, 20, 25],      [3, 25, 30],      [4, 23, 35],      [5, 28, 36],      [6, 19, 40],      [7, 80, 100]    ]);      var joineddata = google.visualization.data.join(data1, data2, 'full', [      [0, 0]    ], [1, 2], [1, 2]);      var options = {      haxis: {        title: 'time'      },      vaxis: {        title: 'popularity'      }    };      var chart = new google.visualization.linechart(document.getelementbyid('chart_div'));    chart.draw(joineddata, options);  }
<script type="text/javascript" src="https://www.google.com/jsapi"></script>  <div id="chart_div">    <div>


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