s="external-link">Matrix</a></span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">tree</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/pkg/ape/man/read.tree.html" class="external-link">read.tree</a></span><span class="op">(</span>text <span class="op">=</span><span class="st">"((t1:1,t2:1)N2:1,(t3:1,t4:1)N3:1)N1;"</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">com</span> <span class="op">&lt;-</span> <