an> <span class='kw'>&lt;-</span> <span class='fu'>tree_physig</span>(<span class='kw'>trait.col</span> <span class='kw'>=</span> <span class='st'>"logMass"</span>, <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>alien.data</span>,
<span class='kw'>phy</span> <span class='kw'>=</span> <span class='no'>alien.phy</span>, <span class='kw'>n.tree</span> <span class='kw'>=</span> <span class='fl'>10</span>)</div><div class='output co'>#&gt; <span class='warning'>Warning: NA's in response 