var option = {
        tooltip: {
            trigger: 'axis',
            formatter: function (params) {
                var relVal = params[0].name;
                for (var i = 0; i < params.length; i++) {
                    //遍历出来的值一般是字符串,需要转换成数字,再进项tiFixed四舍五入
                    relVal += '<br/>'  + (Number(params[i].value)/100).toFixed(2)
                }
                return relVal
            },
            axisPointer: {
                type: 'cross',
                crossStyle: {
                    color: '#999'
                }
            }
        },
        }