来自Datable的json groupby数据

问题描述

我希望从这里使用此amCharts库来实现一些可视化。 https://www.amcharts.com/demos/grouped-countries-map/

我已经序列化了我的数据表，但似乎无法正常工作，我不确定如何对4个类别/地区进行分组。

任何帮助/建议都是很好的帮助。

var groupData = [
  {
    "name": "EU member before 2004","color": chart.colors.getIndex(0),"data": [
      {
        "title": "Austria","id": "AT",// With MappolygonSeries.useGeodata = true,it will try and match this id,then apply the other properties as custom data
        "customData": "1995"
      },{
        "title": "Ireland","id": "IE","customData": "1973"
      },{
        "title": "Denmark","id": "DK",{
        "title": "Portugal","id": "PT","customData": "1986"
      }
    ]
  },{
    "name": "Joined at 2004","color": chart.colors.getIndex(1),"data": [
      {
        "title": "Lithuania","id": "LT","customData": "2004","groupId": "2004"
      },{
        "title": "Latvia","id": "LV","groupId": "2004"
      }
  },{
    "name": "Joined at 2007","color": chart.colors.getIndex(3),"data": [
      {
        "title": "Romania","id": "RO","customData": "2007"
      },{
        "title": "Bulgaria","id": "BG","customData": "2007"
      }
    ]
  },{
    "name": "Joined at 2013","color": chart.colors.getIndex(4),"data": [
      {
        "title": "Croatia","id": "HR","customData": "2013"
      }
    ]
  }
];

解决方法

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