echarts tooltip信息添加%

tooltip : {        trigger: 'axis',        formatter:function(params)        {           var relVal = params[0].name;           for (var i = 0, l = params.length; i < l; i++) {                relVal += '<br/>' + params[i].seriesName + ' : ' + params[i].value+"%";            }           return relVal;        }    },

参考文档：

http://echarts.baidu.com/doc/doc.html#Tooltip

http://echarts.baidu.com/doc/example/tooltip.html#