 class="figcaption">Simple model</div>
</div>
</div>
<div class="section level3">
<h3 id="ggplot-layers">ggplot layers<a class="anchor" aria-label="anchor" href="#ggplot-layers"></a>
</h3>
<p>The model that is produced is a <code>ggplot</code> object and
additional layers can be added in the usual way.</p>
<div class="sourceCode" id="cb2"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">model</span> <span class="op">|&gt;</span></span>
<span>  <span class="fu"><a href="..