最近需要做很多点的极坐标图，如果每个点的label都显示，会叠加在一起，视觉效果很差，查看echart的文档，可以设置interval ,但是 设置的时候没有效果，只能间接实现间隔显示label

var hours = ['3/20 8时', '3/20 9时', '3/20 10时', '3/20 11时', '3/20 12时', '3/20 13时', '3/20 14时','3/20 15时', '3/20 16时', '3/20 17时', '3/20 18时', '3/20 19时','3/20 20时', '3/20 21时', '3/20 22时', '3/20 23时', '3/20 0时','3/20 1时', '3/20 2时', '3/20 3时', '3/20 4时', '3/20 5时', '3/20 6时', '3/20 7时','3/21 8时', '3/21 9时', '3/21 10时', '3/21 11时', '3/21 12时', '3/21 13时', '3/21 14时','3/21 15时', '3/21 16时', '3/21 17时', '3/21 18时', '3/21 19时','3/21 20时', '3/21 21时', '3/21 22时', '3/21 23时', '3/21 0时','3/21 1时', '3/21 2时', '3/21 3时', '3/21 4时', '3/21 5时', '3/21 6时', '3/21 7时','3/22 8时', '3/22 9时', '3/22 10时', '3/22 11时', '3/22 12时', '3/22 13时', '3/22 14时','3/22 15时', '3/22 16时', '3/22 17时', '3/22 18时', '3/22 19时','3/22 20时', '3/22 21时', '3/22 22时', '3/22 23时', '3/22 0时','3/22 1时', '3/22 2时', '3/22 3时', '3/22 4时', '3/22 5时', '3/22 6时', '3/22 7时','3/23 8时', '3/23 9时', '3/23 10时', '3/23 11时', '3/23 12时', '3/23 13时', '3/23 14时','3/23 15时', '3/23 16时', '3/23 17时', '3/23 18时', '3/23 19时','3/23 20时', '3/23 21时', '3/23 22时', '3/23 23时', '3/23 0时','3/23 1时', '3/23 2时', '3/23 3时', '3/23 4时', '3/23 5时', '3/23 6时', '3/23 7时','3/24 8时', '3/24 9时', '3/24 10时', '3/24 11时', '3/24 12时', '3/24 13时', '3/24 14时','3/24 15时', '3/24 16时', '3/24 17时', '3/24 18时', '3/24 19时','3/24 20时', '3/24 21时', '3/24 22时', '3/24 23时', '3/24 0时','3/24 1时', '3/24 2时', '3/24 3时', '3/24 4时', '3/24 5时', '3/24 6时', '3/24 7时','3/25 8时', '3/25 9时', '3/25 10时', '3/25 11时', '3/25 12时', '3/25 13时', '3/25 14时','3/25 15时', '3/25 16时', '3/25 17时', '3/25 18时', '3/25 19时','3/25 20时', '3/25 21时', '3/25 22时', '3/25 23时', '3/25 0时','3/25 1时', '3/25 2时', '3/25 3时', '3/25 4时', '3/25 5时', '3/25 6时', '3/25 7时','3/26 8时', '3/26 9时', '3/26 10时', '3/26 11时', '3/26 12时', '3/26 13时', '3/26 14时','3/26 15时', '3/26 16时', '3/26 17时', '3/26 18时', '3/26 19时','3/26 20时', '3/26 21时', '3/26 22时', '3/26 23时', '3/26 0时','3/26 1时', '3/26 2时', '3/26 3时', '3/26 4时', '3/26 5时', '3/26 6时', '3/26 7时'
];
var labelIndex = 0;
var labelInterval;
var splitLineColor = ['#999'];
//随机生成168个数据
var data = [];
for (i = 0; i < 168; i++) {var num = Math.floor(Math.random() * 50 + 50);data.push(num);
}
//设置间隔数
if (data.length < 24) {labelInterval = 1
} else {labelInterval = data.length / 24;
}
//设置分隔线的颜色
for (i = 1; i <= data.length / 24; i++) {if (i > 1) {splitLineColor.push("transparent");}
}
var option1 = {title: {// text: 'Punch Card of Github',},legend: {data: ['第1周压力（bar）'],//left: 'right'},polar: {center: ['50%', '46%'],radius: "78%"},tooltip: {trigger: 'axis',},angleAxis: {type: 'category',data: hours,boundaryGap: false,startAngle: 0,axisLabel: {formatter: function(value, index) {console.log(value, index);//显示所有的value与index值if (index % labelInterval === 0) {return value //显示此index的label的值} else {return ""}}},axisTick: {show: false},splitArea: {//show:true,areaStyle: {//color: "gray",//opacity:0.6,}},splitLine: {show: true,interval: 5,zlevel: 50,lineStyle: {color: splitLineColor,type: 'dashed'}},axisLine: {show: true}},radiusAxis: {min: 10,axisLine: {show: true},axisLabel: {rotate: 0}},series: [{name: '第1周压力（bar）',type: 'line',coordinateSystem: 'polar',showSymbol: false,data: data,itemStyle: {normal: {color: "#fb920b"}},}, ]
};var myChart = echarts.init(document.getElementById('polar'), theme);
myChart.setOption(option1);ObjectResize(myChart.resize)function ObjectResize(fn) {if (window.addEventListener) {window.addEventListener("resize", fn, false);} else {window.attachEvent("onresize", fn)}
}