the parallel coordinate plot even in the presence of categorical variables.</p>
</div>
<div class="section level3">
<h3 id="the-layer-approach">The layer approach<a class="anchor" aria-label="anchor" href="#the-layer-approach"></a>
</h3>
<p><code>ggpcp</code> implements several geoms to work in a parallel coordinate plot setting</p>
<ul>
<li>
<code>geom_pcp</code> is a wrapper for the standard layer of drawing line segments for each observation across the specified variables</li>
<li>
<code>geom_pcp_axes</c