i class="chapter" data-level="2.1" data-path="grammar.html"><a href="grammar.html#ggplot"><i class="fa fa-check"></i><b>2.1</b> The ggplot2 Package</a></li>
<li class="chapter" data-level="2.2" data-path="grammar.html"><a href="grammar.html#components"><i class="fa fa-check"></i><b>2.2</b> The Components of a ggplot</a></li>
<li class="chapter" data-level="2.3" data-path="grammar.html"><a href="grammar.html#key-components"><i class="fa fa-check"></i><b>2.3</b> Key Components</a>
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<li class="chapter" dat