Question

I have drawn a Google visualization table chart. How can I get the DataTable that is used to draw the chart? For example, how to get the value of first 5 rows and column 1.

Answer 1

If you are using the ChartWrapper you can get the DataTable like this:

  var wrapper = new google.visualization.ChartWrapper({
    chartType:  ColumnChart ,
    dataTable: [[ Germany ,  USA ,  Brazil ,  Canada ,  France ,  RU ],
                [700, 300, 400, 500, 600, 800]],
    options: { title :  Countries },
    containerId:  visualization 
  });
  wrapper.draw();
  // get the DT
  var dt = wrapper.getDataTable();
  console.log(dt);

如果你想从数据表中获得价值,你可使用<>getValue(rowIndex,栏目Index)一种数据表方法:

var dt = wrapper.getDataTable();
alert(dt.getValue(3, 1));

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