Echarts实战案例代码(34)：柱状图箭头增长下降

//定义两个上下箭头的矢量路径
var up = 'path://M286.031,265l-16.025,3L300,223l29.994,45-16.041-3-13.961,69Z';
var down = 'path://M216.969,292l16.025-3L203,334l-29.994-45,16.041,3,13.961-69Z'

    series: [
        {
            "name": "",
            type: 'pictorialBar',
            symbol: function(data,params){
                if(data2[params.dataIndex]>0){
                    return up
                }else{
                    return down
                }
            },
            symbolSize: [20, 30],
            symbolOffset: [0, -40],
            color:'orange',
            symbolPosition: 'end',
            label: {
                show: true,
                position: "top",
                formatter:  function(params){
                    return data2[params.dataIndex]
                },
                fontSize: 30,
                fontWeight: 'bold',
                color: '#34DCFF'
            },
            data: data1
        },
        {
            name: '直接访问',
            type: 'bar',
            barWidth: '40%',
            data: data1
        }
    ]

重点代码：

 symbol: function(data,params){
                if(data2[params.dataIndex]>0){
                    return up
                }else{
                    return down
                }
            }

DONE!