javascript - Google Charts 折线图中 a 轴上的日期

Question

这是一个新手问题，但我如何在 Google Charts line chart 中使用 x 轴的日期？ ？

当我使用 new Date( ... ) 时，我收到错误消息“ Uncaught Error :不支持日期和日期时间列类型”

      google.load("visualization", "1", {packages:["corechart"]});
      google.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable([
['Datum','Person1','Person2','Person3'],
[new Date(2012, 12, 19, 0, 0, 0),'5072.0537223002','5072.0537223002','5074.2809630567'],
[new Date(2012, 12, 20, 0, 0, 0),'5072.0537223002','5072.0537223002','5074.2809630567'],
]);

        var options = {};

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

(在 x 轴上使用均匀间隔的字符串是可以接受的，但是当我尝试使用字符串时“轴 #0 的数据列不能是字符串类型”)

Answer 1

如何将日期转换为字符串并只使用 Date 而不使用 new ，如下所示:

      google.load("visualization", "1", {packages:["corechart"]});
      google.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable([
['Datum','Person1','Person2','Person3'],
[Date(2012, 12, 19, 0, 0, 0).toString(),'5072.0537223002','5072.0537223002','5074.2809630567'],
[Date(2012, 12, 20, 0, 0, 0).toString(),'5072.0537223002','5072.0537223002','5074.2809630567'],
]);

        var options = {};

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

编辑: 您可以在此链接中按照他们的示例进行操作:

https://google-developers.appspot.com/chart/interactive/docs/customizing_axes

编辑 2:

这是我能做的: http://jsfiddle.net/ANC9H/2/

    google.load("visualization", "1", {packages:["LineChart"]});
    google.setOnLoadCallback(drawChart);
    function drawChart() {
    var data = new google.visualization.DataTable();
        data.addColumn('date', 'Date');
        data.addColumn('number', 'persone1');
        data.addColumn('number', 'persone2');
        data.addColumn('number', 'persone3');
        data.addRows([
                       [new Date(2008, 1 ,1),0.7,0.8,0.6],
                       [new Date(2008, 1 ,7),0.5,0.55,0.9] ]);
    var options = {};

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

希望对您有所帮助。