age <span class="op">=</span> <span class="st">"mlbench"</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Keep the target column as "Class"</span></span></span>
<span class="r-in"><span><span class="va">target_col</span> <span class="op">&lt;-</span> <span class="st">"Class"</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># Change the positive class to "malignant"</spa