ass="chapter" data-level="3.2.2" data-path="data-structures.html"><a href="data-structures.html#mat_array"><i class="fa fa-check"></i><b>3.2.2</b> Matrices and arrays</a></li>
<li class="chapter" data-level="3.2.3" data-path="data-structures.html"><a href="data-structures.html#lists"><i class="fa fa-check"></i><b>3.2.3</b> Lists</a></li>
<li class="chapter" data-level="3.2.4" data-path="data-structures.html"><a href="data-structures.html#df"><i class="fa fa-check"></i><b>3.2.4</b> Data frames</a></li>
</ul>