縦棒グラフ (Column Chart)

ここでは，縦棒グラフを作成してみる．詳細は https://developers.google.com/chart/interactive/docs/gallery/columnchart で確認できる．

縦棒グラフを描いてみる

index.html
<!DOCTYPE html>
<html lang="ja">
  <head>
    <meta charset="utf-8">
    <title>Google Charts</title>
    <!--Load the AJAX API-->
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">

      // Load the Visualization API and the corechart package.
      google.charts.load('current', {'packages':['corechart','bar'], 'language': 'ja'});

      // Set a callback to run when the Google Visualization API is loaded.
      google.charts.setOnLoadCallback(drawChart);

      // Callback that creates and populates a data table,
      // instantiates the pie chart, passes in the data and
      // draws it.
      function drawChart() {

        // Create the data table.
        var data = new google.visualization.DataTable();
        data.addColumn('timeofday', 'Time of Day');
        data.addColumn('number', 'Motivation Level');
        data.addColumn('number', 'Energy Level');

        data.addRows([
          [{v: [8, 0, 0], f: '8 am'}, 1, .25],
          [{v: [9, 0, 0], f: '9 am'}, 2, .5],
          [{v: [10, 0, 0], f:'10 am'}, 3, 1],
          [{v: [11, 0, 0], f: '11 am'}, 4, 2.25],
          [{v: [12, 0, 0], f: '12 pm'}, 5, 2.25],
          [{v: [13, 0, 0], f: '1 pm'}, 6, 3],
          [{v: [14, 0, 0], f: '2 pm'}, 7, 4],
          [{v: [15, 0, 0], f: '3 pm'}, 8, 5.25],
          [{v: [16, 0, 0], f: '4 pm'}, 9, 7.5],
          [{v: [17, 0, 0], f: '5 pm'}, 10, 10],
        ]);

        // Set chart options
        var options = {
          title: 'Motivation and Energy Level Throughout the Day',
          focusTarget: 'category',
          width:800,
          height:500,
          hAxis: {
            title: 'Time of Day',
            format: 'h:mm a',
            viewWindow: {
              min: [7, 30, 0],
              max: [17, 30, 0]
            },
          },
          vAxis: {
            title: 'Rating (scale of 1-10)',
          }
        };
        // Instantiate and draw our chart, passing in some options.
        var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>

  <body>
    <!--Div that will hold the pie chart-->
    <div id="chart_div"></div>
  </body>
</html>

オプションを指定する

次に，縦軸・横軸や軸ラベルのフォントなどを変更してみよう．（サンプルを見る）

index.html（抜粋）
// Set chart options
var options = {
  title: 'Motivation and Energy Level Throughout the Day',
  focusTarget: 'category',
  width:800,
  height:500,
  hAxis: {
    title: 'Time of Day',
    format: 'h:mm a',
    viewWindow: {
      min: [7, 30, 0],
      max: [17, 30, 0]
    },
    textStyle: {
      fontSize: 14,
      color: '#053061',
      bold: true,
      italic: false
    },
    titleTextStyle: {
      fontSize: 18,
      color: '#053061',
      bold: true,
      italic: false
    }
  },
  vAxis: {
    title: 'Rating (scale of 1-10)',
    textStyle: {
      fontSize: 18,
      color: '#67001f',
      bold: false,
      italic: false
    },
    titleTextStyle: {
      fontSize: 18,
      color: '#67001f',
      bold: true,
      italic: false
    }
  }
};

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