"><a href="wrangling-data-frames.html"><i class="fa fa-check"></i><b>3.4</b> Wrangling data frames</a>
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<li class="chapter" data-level="3.4.1" data-path="wrangling-data-frames.html"><a href="wrangling-data-frames.html#positional-indexes"><i class="fa fa-check"></i><b>3.4.1</b> Positional indexes</a></li>
<li class="chapter" data-level="3.4.2" data-path="wrangling-data-frames.html"><a href="wrangling-data-frames.html#logical-indexes"><i class="fa fa-check"></i><b>3.4.2</b> Logical indexes</a></li>
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