Google Charts Histogram Chart Buckets

Google Charts Histogram Chart Buckets

<html>
   <head>
      <title>Google Charts Tutorial</title>
      <script type = "text/javascript" src = "https://www.gstatic.com/charts/loader.js">
      </script>
      <script type = "text/javascript">
         google.charts.load('current', {packages: ['corechart']});     
      </script>
   </head>

   <body>
      <div id = "container" style = "width: 550px; height: 400px; margin: 0 auto">
      </div>
      <script language = "JavaScript">
         function drawChart() {
            // Define the chart to be drawn.
            var data = google.visualization.arrayToDataTable([
               ['Student Roll No', 'height'],
               ['1', 80],['2', 55],['3', 68],['4', 80],['5', 54],
               ['6', 70],['7', 85],['8', 78],['9', 70],['10', 58],
               ['11', 90],['12', 65],['13', 88],['14', 82],['15', 65],
               ['16', 86],['17', 45],['18', 62],['19', 84],['20', 75],
               ['21', 82],['22', 75],['23', 58],['24', 70],['25', 85]         
            ]);

            // Set chart options
            var options = {
               title: 'Students height, in cms',
               legend: { position: 'none' },
               histogram: { bucketSize: 5 }
            };              

            // Instantiate and draw the chart.
            var chart = new google.visualization.Histogram(document.getElementById('container'));
            chart.draw(data, options);
         }
         google.charts.setOnLoadCallback(drawChart);
      </script>
   </body>
</html>