ref="120_logical.html#evaluation-of-elements-of-logicalvector"><i class="fa fa-check"></i><b>11.4</b> Evaluation of elements of LogicalVector</a></li>
</ul></li>
<li class="chapter" data-level="12" data-path="140_dataframe.html"><a href="140_dataframe.html"><i class="fa fa-check"></i><b>12</b> DataFrame</a>
<ul>
<li class="chapter" data-level="12.1" data-path="140_dataframe.html"><a href="140_dataframe.html#creating-a-dataframe-object"><i class="fa fa-check"></i><b>12.1</b> Creating a DataFrame object</a></