="op">~</span><span class="va">.</span>,</span>
<span>                     data <span class="op">=</span> <span class="va">heart.train</span>,</span>
<span>                     data.test <span class="op">=</span> <span class="va">heart.test</span>,</span>
<span>                     main <span class="op">=</span> <span class="st">"Heart Disease"</span>,</span>
<span>                     decision.labels <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c<