echarts label的显示，如何让formatter传的值只显示最后一个

weixin_38048154 2016-09-21 12:09:17

在将echarts改为只显示最后一个折点，并且显示名称为折线的名字，我借用了label的显示，设置如下：

//这是在官网调试然后下载的 <!DOCTYPE html> <html style="height: 100%"> <head> <meta charset="utf-8"> </head> <body style="height: 100%; margin: 0"> <div id="container" style="height: 100%"></div> <script type="text/javascript" src="http://echarts.baidu.com/gallery/vendors/echarts/echarts-all-3.js"></script> <script type="text/javascript" src="http://echarts.baidu.com/gallery/vendors/echarts/extension/dataTool.min.js"></script> <script type="text/javascript" src="http://echarts.baidu.com/gallery/vendors/echarts/map/js/china.js"></script> <script type="text/javascript" src="http://echarts.baidu.com/gallery/vendors/echarts/map/js/world.js"></script> <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=ZUONbpqGBsYGXNIYHicvbAbM"></script> <script type="text/javascript" src="http://echarts.baidu.com/gallery/vendors/echarts/extension/bmap.min.js"></script> <script type="text/javascript"> var dom = document.getElementById("container"); var myChart = echarts.init(dom); var app = {}; option = null; option = { title: { text: '系统性能', left:'center', top:'10%' }, tooltip: { trigger: 'xAxis', show:true, showContent:true, enterable :false }, grid: { left: '3%', right: '10%', bottom: '3%', containLabel: true }, toolbox: { feature: { saveAsImage: {} } }, xAxis: { type: 'category', boundaryGap: false, splitLine:{show: false}, data: ['2016/9/19 10:10:23 ','',' 24:10','',' 00:10','','2016/9/20 10:10:23'] }, yAxis: { type: 'value', splitLine:{show: false} }, series: [ { name:'HARD DISK', type:'line', stack: '总量', data:[ { value:134, symbol: 'none' },{ value:100, symbol: 'none' },{ value:20, symbol: 'none' },{ value:43, symbol: 'none' },{ value:66, symbol: 'none' }, {value:80,symbol: 'none'},{value:190, symbol:'circle',symbolSize:8}], lineStyle:{ normal:{ width:2, //连线粗细 color: "#00479d" //连线颜色 } }, itemStyle: { normal: { color: function(params) { var colorList = ['','', '','','','','#00479d']; return colorList[params.dataIndex%7];//params.dataIndex } ,label: { show: true, position: 'right', textStyle : { fontSize : '15', fontFamily : '微软雅黑', color : '#000', }, formatter: function(params){ console.log(params + ','+typeof(params)); return "HARD DISK"; } }, } }, }, { name:'MEMORY', type:'line', stack: '总量', data:[ { value:134, symbol: 'none' },{ value:100, symbol: 'none' },{ value:20, symbol: 'none' },{ value:43, symbol: 'none' },{ value:66, symbol: 'none' },{value:80,symbol: 'none'},{value:190, symbol:'circle',symbolSize:8}], lineStyle:{ normal:{ width:2, //连线粗细 color: "#f52244" //连线颜色 } }, itemStyle: { normal: { color: function(params) { var colorList = ['','', '','','','','#f52244']; return colorList[params.dataIndex%7];//params.dataIndex } ,label: { show: true, position: 'right', textStyle : { fontSize : '15', fontFamily : '微软雅黑', color : '#000', }, formatter: function(params){ console.log(params + ','+typeof(params)); return "MEMORY"; } }, } }, }, { name:'CPU', type:'line', stack: '总量', //设置折线中折点的形状和颜色，并给最后一个点加上线的名称 data:[ { value:24, symbol: 'none' }, { value:224, symbol: 'none' },{ value:200, symbol: 'none' },{ value:209, symbol: 'none' },{ value:143, symbol: 'none' },{ value:86, symbol: 'none' },{value:90, symbol:'circle',symbolSize:8}], lineStyle:{ normal:{ width:2, //连线粗细 color: "#ffca02" //连线颜色 } }, itemStyle: { normal: { color: function(params) { var colorList = [ '','', '','', '','','#ffca02' ]; return colorList[params.dataIndex%7];//params.dataIndex } ,label: { show: true, position: 'right', textStyle : { fontSize : '15', fontFamily : '微软雅黑', color : '#000', }, formatter: function(params){ console.log(params + ','+typeof(params)); return "CPU"; } }, } } } ] };; if (option && typeof option === "object") { myChart.setOption(option, true); } </script> </body> </html> itemStyle: { normal: { color: function(params) { var colorList = [ '','', '','', '','','pink' ]; return colorList[params.dataIndex%7];//params.dataIndex } ,label: { show: true, position: 'right', textStyle : { fontSize : '15', fontFamily : '微软雅黑', fontWeight : 'bold', color : '#28c6de', }, formatter: function(params){ console.log(params + ','+typeof(params)); return "CPU"; } }, } } 结果的出来的鼠标经过每个折点都会显示折线的名。改怎样去掉鼠标经过这个问题？