Echarts-雷达图

 // 显示能力雷达图
     $(".company .grade").hover(function () {
        $(".powerChart").show();
        var id = $(this).attr("data-id");
        var positionX = $(this).offset().left;
        var positionY = $(this).offset().top;
       $.ajax({
            type: "POST",
            cache: false,
            url: "/Question/GetShopRadarMap",
            data: {
                shopId: id
            },
            contentType: "application/x-www-form-urlencoded",
            dataType: "json",
            async: false,
            success: function (result) {
                var myChart;
                var domMain = document.getElementById('powerChart');
                var option = {
                    tooltip: {
                        trigger: 'axis'
                    },
                    radar: {
                        name: {
                            textStyle: {
                                color: '#000'
                            }
                        },
                        indicator: [],//雷达图数据
                        nameGap:,//文字距离图形的距离
                        radius: //设置雷达图大小                    },
                    series: []
                };                var category = result.resultList;
                var num = [];
                for (var i = ; i < category.length; i++) {
                    option.radar.indicator.push({ name: category[i].CategoryName});
                    num.push(category[i].AnswerNum);
                }                option.series.push({
                    type: 'radar',
                    data: [{
                         value: num
                    }]
                });
                myChart = echarts.init(domMain);
                myChart.setOption(option, true);            }
        });
        $(".powerChart").css({ "left": positionX-, "top": positionY+ });// 定位雷达图显示的位置    },function() {
        $(".powerChart").hide();
    }); 

html：<div id="powerChart"></div>css：#powerChart{width: 220px;height:180px;margin:  15px;}