n class="op">(</span><span class="st">"Cutthroat Trout"</span>,group<span class="op">=</span><span class="st">"lentic"</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>            species  group measure  units ref method min.TL    int slope</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 55 Cutthroat Trout lentic      TL metric  75    RLP    130 -5.192 3.086</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                     sour