io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"goldenrod1"</span>, <span class="st">"indianred3"</span>, <span class="st">"royalblue3"</span>, <span class="st">"darkorchid4"</span><span class="op">)</span><span class="op">)</span>,</span>
<span>    <span class="va">expt_df</span><span class="op">$</span><span class="va">Sample_ID</span><span class="op">)</span><span class="op">)</span></span>
<span><span class="va">kbl</span> <span class="op">&lt;-</span> <spa