<span class="op">[</span>, <span class="st">"meand15NPl"</span><span class="op">]</span>,</span>
<span>  Source <span class="op">=</span> <span class="st">"Mixtures"</span></span>
<span><span class="op">)</span></span></code></pre></div>
<p>Then we call the <code>new_scale_color</code> function from
<code>ggnewscale</code> with the <code>geom_polygon</code> command to
create the polygon</p>
<div class="sourceCode" id="cb12"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va"