可视化数据网页开发Google Charts（五）:画多个图表

这个页面展示了如何在一个web页面上绘制多个图表。

在一页纸上画多个图表

如果您想在一个web页面上绘制多个图表，请在页面的<head>中包含以下代码:

在一次对google.chart . Load()的调用中加载图表所需的所有包。
对于页面上的每个图表，添加一个对google.chart . setonloadcallback()的调用，使用绘制图表作为输入的回调函数——例如google.chart . setonloadcallback (myPieChart)。

例如，假设您想要绘制两个饼图，显示您的朋友Sarah和Anthony昨晚吃了多少披萨。下面的示例显示了如何并排显示这两个图表。

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">

      // Load Charts and the corechart package.
      google.charts.load('current', {'packages':['corechart']});

      // Draw the pie chart for Sarah's pizza when Charts is loaded.
      google.charts.setOnLoadCallback(drawSarahChart);

      // Draw the pie chart for the Anthony's pizza when Charts is loaded.
      google.charts.setOnLoadCallback(drawAnthonyChart);

      // Callback that draws the pie chart for Sarah's pizza.
      function drawSarahChart() {

        // Create the data table for Sarah's pizza.
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows([
          ['Mushrooms', 1],
          ['Onions', 1],
          ['Olives', 2],
          ['Zucchini', 2],
          ['Pepperoni', 1]
        ]);

        // Set options for Sarah's pie chart.
        var options = {title:'How Much Pizza Sarah Ate Last Night',
                       width:400,
                       height:300};

        // Instantiate and draw the chart for Sarah's pizza.
        var chart = new google.visualization.PieChart(document.getElementById('Sarah_chart_div'));
        chart.draw(data, options);
      }

      // Callback that draws the pie chart for Anthony's pizza.
      function drawAnthonyChart() {

        // Create the data table for Anthony's pizza.
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows([
          ['Mushrooms', 2],
          ['Onions', 2],
          ['Olives', 2],
          ['Zucchini', 0],
          ['Pepperoni', 3]
        ]);

        // Set options for Anthony's pie chart.
        var options = {title:'How Much Pizza Anthony Ate Last Night',
                       width:400,
                       height:300};

        // Instantiate and draw the chart for Anthony's pizza.
        var chart = new google.visualization.PieChart(document.getElementById('Anthony_chart_div'));
        chart.draw(data, options);
      }
    </script>
  </head>
  <body>
    <!--Table and divs that hold the pie charts-->
    <table class="columns">
      <tr>
        <td><div id="Sarah_chart_div" style="border: 1px solid #ccc"></div></td>
        <td><div id="Anthony_chart_div" style="border: 1px solid #ccc"></div></td>
      </tr>
    </table>
  </body>
</html>

<html>
  <head>
    <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">

      // Load Charts and the corechart and barchart packages.
      google.charts.load('current', {'packages':['corechart']});

      // Draw the pie chart and bar chart when Charts is loaded.
      google.charts.setOnLoadCallback(drawChart);

      function drawChart() {

        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows([
          ['Mushrooms', 3],
          ['Onions', 1],
          ['Olives', 1],
          ['Zucchini', 1],
          ['Pepperoni', 2]
        ]);

        var piechart_options = {title:'Pie Chart: How Much Pizza I Ate Last Night',
                       width:400,
                       height:300};
        var piechart = new google.visualization.PieChart(document.getElementById('piechart_div'));
        piechart.draw(data, piechart_options);

        var barchart_options = {title:'Barchart: How Much Pizza I Ate Last Night',
                       width:400,
                       height:300,
                       legend: 'none'};
        var barchart = new google.visualization.BarChart(document.getElementById('barchart_div'));
        barchart.draw(data, barchart_options);
      }
</script>
<body>
    <!--Table and divs that hold the pie charts-->
    <table class="columns">
      <tr>
        <td><div id="piechart_div" style="border: 1px solid #ccc"></div></td>
        <td><div id="barchart_div" style="border: 1px solid #ccc"></div></td>
      </tr>
    </table>
  </body>
</html>

可视化数据网页开发Google Charts（五）:画多个图表

在一页纸上画多个图表

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