添加清空图表

src/app/examiner/statistic-analysis/examStatistics/echarts/echarts.component.ts

@@ -120,7 +120,7 @@ export class EchartsComponent implements OnInit {
       this.color = "#FF8678";
     }
     let myChart = echarts.init(document.getElementById("zhidui"));
-    myChart.clear();
+    myChart.dispose();
     this.initCharts();
   }
   //后退
@@ -238,12 +238,12 @@ export class EchartsComponent implements OnInit {
     if (e.name.indexOf("支队") != -1) {
       this.zhiData = this.daData;
       this.level = 1;
-      myChart.clear();
+      myChart.dispose();
       this.initCharts();
     } else if (e.name.indexOf("大队") != -1) {
       this.zhiData = this.jiuData;
       this.level = 2;
-      myChart.clear();
+      myChart.dispose();
       this.initCharts();
     } else {
       window.open("home/statistic-examination/station-examinee");