code: function(axis,name,stacked){
      var _self = this,
        data = [],
        series = _self._getRelativeSeries(axis,name);
      axis = axis || _self.get('yAxis');
      name = name || 'yAxis';
  
      Util.each(series,function(item){
        if(name == 'xAxis' || (stacked && item.isStacked && item.isStacked())|| (!stacked &&(!item.isStacked || !item.isStacked()))){
          if(item.get(name) == axis){
            var arr = item.getData(name);
            if(arr.length){
              data.push(arr);
            }
          }
        }
      });
  
      return data;
    }
docs: 获取数据序列的数据
  @protected
  @param  {Chart.Axis} axis 坐标轴
  @param  {String} name 坐标轴名称
  @return {Array} 数据集合