如何将另一个数据系列添加到 Google 图表 [英] How to add another data series to a Google chart

问题描述

我按照此页面上的示例设置了一个简单的 Google 图表:http://code.google.com/apis/chart/interactive/docs/gallery/linechart.html

I have setup a simple Google Chart by following the example on this page: http://code.google.com/apis/chart/interactive/docs/gallery/linechart.html

 google.load("visualization", "1", {packages:["corechart"]});
      google.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Year');
        data.addColumn('number', 'Sales');
        data.addColumn('number', 'Expenses');
        data.addRows([
        ['2004', 1000, 400],
        ['2005', 1170, 460],
        ['2006',  860, 580],
        ['2007', 1030, 540]
        ]);

        var options = {
          width: 400, height: 240,
          title: 'Company Performance'
        };

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

但是现在，在渲染之后，我想使用一些 javascript 动态添加另一系列数据.任何人都可以指出我如何做到这一点的正确方向吗?
我要添加的数据，一个包含员工人数的数字列，应该在图表中以另一种颜色显示一个新行，并且不是从 2004 年开始，而是从 2005 年开始，

But now, after it's rendered, with some javascript i want to dynamically add another series of data. Can anyone point me in the right direction on how to do this?
The data i want to add, a number column with the number of employees, should show a new line in the chart, in another color and doesn't start at year 2004 but at 2005,

推荐答案

您需要将新数据添加到 'data' 变量并再次调用 chart.draw() 方法.查看 DataTable 文档或在 http://code.google.com/apis/ajax/playground/?type=visualization#line_chart

You need to add new data to 'data' variable and call the chart.draw() method again. See the DataTable docs or play a bit at http://code.google.com/apis/ajax/playground/?type=visualization#line_chart

示例:

  // Add columns
  data.addColumn('string', 'Employee Name');
  data.addColumn('date', 'Start Date');

  // Add empty rows
  data.addRows(6);
  data.setCell(0, 0, 'Mike');
  data.setCell(0, 1, {v:new Date(2008,1,28), f:'February 28, 2008'});
  data.setCell(1, 0, 'Bob');
  data.setCell(1, 1, new Date(2007, 5, 1));
  data.setCell(2, 0, 'Alice');
  data.setCell(2, 1, new Date(2006, 7, 16));
  data.setCell(3, 0, 'Frank');
  data.setCell(3, 1, new Date(2007, 11, 28));
  data.setCell(4, 0, 'Floyd');
  data.setCell(4, 1, new Date(2005, 3, 13));
  data.setCell(5, 0, 'Fritz');
  data.setCell(5, 1, new Date(2007, 9, 2));

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