><span class="va">tree</span><span class="op">)</span>
<span class="co">#&gt;   stratum id tree     P.hn  P.hn.cov      P.hr  P.hr.cov</span>
<span class="co">#&gt; 1       1  1    1 0.922808 0.9293580 0.9388107 0.9519734</span>
<span class="co">#&gt; 2       1  1    2 0.922808 0.8922843 0.9388107 0.9199997</span>
<span class="co">#&gt; 3       1  1    3 0.922808 0.9146826 0.9388107 0.9389643</span>
<span class="co">#&gt; 4       1  1    4 0.922808 0.9017652 0.9388107 0.9278849</span>
<span class="co">#&gt;