[visualization-api] Slanting Lines in Stepped Area Chart

[Himanshu Tongya]

We are using a stepped area chart to draw the steps for ON and OFF state.

We are using below code -

google.charts.load('current', {'packages':['corechart']});
     google.charts.setOnLoadCallback(drawChart);

      function drawChart() {
        var data = google.visualization.arrayToDataTable([
          ["Time",  "State"],
          [new Date(Number("1553076311009")), 0],
          [new Date(Number("1553076312010")), 1],
          [new Date(Number("1553076313011")), 0],
          [new Date(Number("1553076314012")), 1],
          [new Date(Number("1553076321013")), 1],
          [new Date(Number("1553076331014")), 1],
          [new Date(Number("1553076341015")), 0],
          [new Date(Number("1553076351016")), 0],
          [new Date(Number("1553076361017")), 1],
          [new Date(Number("1553076371018")), 0],
          [new Date(Number("1553076381019")), 1],
          [new Date(Number("1553076391020")), 1],
          [new Date(Number("1553076392021")), 1],
          [new Date(Number("1553076393022")), 0],
          [new Date(Number("1553076394023")), 0],
          [new Date(Number("1553076395024")), 1],
          [new Date(Number("1553076396025")), 0],
          [new Date(Number("1553076397026")), 1],
          [new Date(Number("1553076398027")), 1],
          [new Date(Number("1553076399057")), 1]
        ]);

        var options = {
          title: 'Machine state chart',
          vAxis: {
          title: 'State',
          ticks: [{v:1.00, f:'ON'}, {v:0.00, f:'OFF'}]},
          hAxis: {
          title: 'Time'},
          isStacked: true
        };

        var chart = new 
google.visualization.SteppedAreaChart(document.getElementById('chart_div'));

        chart.draw(data, options);
      }


That code is with sample data, we have around 500 entries so charts should 
be like *Desired.png* but it is looking like 


*Reported.png.Lines are slanting instead of vertical.Any suggestion to 
resolve this issue?*

*Thanks*
*Himanshu*

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