k">c</a></span><span class="op">(</span><span class="st">"Fair"</span> <span class="op">=</span> <span class="st">"blue w/ black outline"</span>, <span class="st">"Good"</span> <span class="op">=</span> <span class="st">"green w/ yellow outline"</span><span class="op">)</span></span>
<span>   <span class="op">)</span></span></code></pre></div>
<p><img src="introduction_files/figure-html/unnamed-chunk-38-1.png" width="624"></p>
<p>Because these cyclical scales are generic <strong>ggplot2</strong>
scales, the