echart 圆饼图NAN%显示结果是什么

var result = {"8月":200,"6月":600,"7月":700,"1月":100,"5月":500,"3月":300,"2月":200,"11月":1100,"9月":900,"4月":400,"12月":1200,"10月":1000};
var arr = [];
for(var key in result){
arr.push({
name:key,
value:result[key]
});
}
console.log(arr); //"[{"name":"8月","value":200},{"name":"6月","value":600},{"name":"7月","value":700},{"name":"1月","value":100},{"name":"5月","value":500},{"name":"3月","value":300},{"name":"2月","value":200},{"name":"11月","value":1100},{"name":"9月","value":900},{"name":"4月","value":400},{"name":"12月","value":1200},{"name":"10月","value":1000}]"

我也出现这个问题了请问您解决了吗