l>
<li class="chapter" data-level="1.2.1" data-path="lesson-1.html"><a href="lesson-1.html#数据清洗"><i class="fa fa-check"></i><b>1.2.1</b> 数据清洗</a></li>
<li class="chapter" data-level="1.2.2" data-path="lesson-1.html"><a href="lesson-1.html#ggplot2画图"><i class="fa fa-check"></i><b>1.2.2</b> ggplot2画图</a></li>
<li class="chapter" data-level="1.2.3" data-path="lesson-1.html"><a href="lesson-1.html#心理学数据分析与结果汇报"><i class="fa fa-check"></i><b>1.2.3</b> 心理学数�