在一个给定轴的所有系列必须

Question

我线图上使用google js工作线图相同的数据类型，并且我已经给用于测试一些样本值和我发现了错误

All series on a given axis must be of the same data type 

脚本

function drawChart() { 
      // var data = google.visualization.arrayToDataTable(chartData); 
      var data = new google.visualization.DataTable(); 
      data.addColumn('number', 'Year'); 
      data.addColumn('string', 'Value'); 
      data.addColumn('number', 'Quantity'); 
      data.addRows([ 
          [2008,'Value1',36], 
          [2009,'Value2',27], 
          [2010,'Value3',39] 
      ]); 
      var options = { 
       title: "Company Performance Product Category Wise", 
       pointSize: 5 
      }; 
      var lineChart = new google.visualization.LineChart(document.getElementById('chart_div')); 
      lineChart.draw(data, options); 
     } 

HTML

<div id="chart_div" style="width: 600px; height: 400px"> 
     </div> 

Answer 1

工作正常，只有两列...

data.addColumn('string', 'Year'); 
data.addColumn('number', 'Quantity'); 
data.addRows([ 
['2008',36], 
['2009',27], 
['2010',39] 
]);