r" data-level="10.2.9" data-path="intro-to-r.html"><a href="intro-to-r.html#factors"><i class="fa fa-check"></i><b>10.2.9</b> Factors</a></li>
<li class="chapter" data-level="10.2.10" data-path="intro-to-r.html"><a href="intro-to-r.html#data-frames"><i class="fa fa-check"></i><b>10.2.10</b> Data frames</a></li>
<li class="chapter" data-level="10.2.11" data-path="intro-to-r.html"><a href="intro-to-r.html#dimensions"><i class="fa fa-check"></i><b>10.2.11</b> Dimensions</a></li>
<li class="chapter" data-level=