examSystem-Anxin/src/app/examiner/statistic-analysis/examStatistics/echarts/echarts.component.html

<div class="conter">
   
    <div class="left">
        <div class="top">
         <span (click)="switch('频次')" [ngClass]="{'select': !examinationIndex}">考试频次</span> |
         <span (click)="switch('人数')" [ngClass]="{'select': examinationIndex}">考试人数</span>   
        </div>
        <div id="zhidui">
        </div>
    </div>
</div>