google.load("visualization", "1.1", {
       packages: ["corechart"]
     });
     google.setOnLoadCallback(drawChart);

     function drawChart() {
       
       var transactions = [[0, 39, 10],
         [12, 21, 7],
         [13, 23, 7],
         [14, 37, 6],
         [15, 38, 6],
         [16, 40, 6],
         [17, 43, 5],
         [18, 40, 8]];
       
       var i=0,j=0;
       var tps = transactions.slice(0);
       for(i=0;i<tps.length;i++){
         for(j=1;j<tps[i].length;j++){
           tps[i][j]=tps[i][j]/1.0;
           tps[i][j]=Number(tps[i][j].toFixed(2));
         }
       }
       
       var data = new google.visualization.DataTable();
       data.addColumn('number', 'Hour');
       data.addColumn('number', 'Positive Tweets - 2018-03-14');
       data.addColumn('number', 'Negative Tweets - 2018-03-14');

       data.addRows(tps);

       var options = {
         title: 'Lithium Twitter Sentimental Analysis Percentage By Hour',
         curveType: 'function',
         pointSize: 5,
         legend: {
           position: 'right',
           alignment: 'center'
         },
         hAxis: {
           title: 'Hour'
         },
         vAxis: {
           title: 'TPS'
         }
       };

       var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
       chart.draw(data, options);
     }