访问D3.js中[Object] [Object]数据的值

My data looks like this:

我的数据如下:

var freqData=[
    {State: 'B1',freq:{ segment1:0.024, segment2:0, segment3:0.07, segment4:0.032, segment5:0.021 }},
    {State: 'B2',freq:{ segment1:0.034, segment2:0.008, segment3:0.024, segment4:0.028, segment5:0.024 }}
  ];
var freqD