span>
<span><span class="va">target_col</span> <span class="op">&lt;-</span> <span class="st">"Class"</span></span>
<span><span class="va">positive_class</span> <span class="op">&lt;-</span> <span class="st">"malignant"</span></span>
<span></span>
<span><span class="co"># Extract relevant columns from dataset</span></span>
<span><span class="va">mydata</span> <span class="op">&lt;-</span> <span class="va">BreastCancer</span><span class="op">[</span>, <span class="op">-</span><span class="fl">1</span><span c