 class="va">Topmodel2007</span><span class="op">$</span><span class="va">preference</span><span class="op">)</span></span>
<span></span>
<span><span class="va">tm_tree</span> <span class="op">=</span> <span class="fu"><a href="https://hturner.github.io/PlackettLuce/reference/pltree.html" class="external-link">pltree</a></span><span class="op">(</span><span class="va">R</span> <span class="op">~</span> <span class="va">.</span>, data <span class="op">=</span> <span class="va">Topmodel2007</span><span class="