2</b> Rectangular binning in R</a></li>
<li class="chapter" data-level="7.3" data-path="frequencies-2D.html"><a href="frequencies-2D.html#categorical-axes"><i class="fa fa-check"></i><b>7.3</b> Categorical axes</a></li>
</ul></li>
<li class="chapter" data-level="8" data-path="d-charts.html"><a href="d-charts.html"><i class="fa fa-check"></i><b>8</b> 3D charts</a>
<ul>
<li class="chapter" data-level="8.1" data-path="d-charts.html"><a href="d-charts.html#markers-1"><i class="fa fa-check"></i><b>8.1</b> Marker