Echarts request data through ajax chart does not display properly

Static data can be displayed normally,through ajax chart does not display properly

  function getCheckDoctor(){
    var echartDoctorWork1 = echarts.init(document.getElementById('check-doctor'));
    var option = {
        title: {
          text: ''
        },
        tooltip: {
            trigger: 'axis'
        },
        legend: {
            data: ''
        },
        grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
        },
        toolbox: {
          show: true,
          orient: 'vertical',
          left: 'right',
          top: 'center'
        },
        xAxis: {
            type: 'category',
            boundaryGap: false,
            data: ''
        },
        yAxis: {
            type: 'value',
            name: '',
            scale: true   
        },
        series: ''
    }


    // get data by ajax
    $.ajax({
      type: 'get',
      url: 'zl.json',
      dataType: 'json',
      success: function(res){
        var data = res.data

        var series = [];  // 多组柱状图数据
        var docArr = [];  // 医生名称数组

        for(var i=2;i<data.length;i++){
          //push docArr
          docArr.push(Object.keys(data[i]).toString())
          //push series 
          series.push({
            name: Object.keys(data[i]).toString(),
            type: 'line',
            stack: '总量'+i,
            data: Object.values(data[i])
          })
        }

        option.xAxis.data = Object.values(data[1])
        console.log(Object.values(data[1]))

        // 赋值后台返回医生名称数组
        option.legend.data = docArr

        // 赋值柱状图数组
        option.series = series

        echartDoctorWork1.setOption(option)
      }
    })

  }

Static data can be displayed normally,through ajax chart does not display properly Static data can be displayed normally,through ajax chart does not display properly Static data can be displayed normally,through ajax chart does not display properly Static data can be displayed normally,through ajax chart does not display properly Static data can be displayed normally,through ajax chart does not display properly Static data can be displayed normally,through ajax chart does not display properly enter image description here

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