 class="va">Year</span><span class="op">+</span><span class="va">Est.Age</span><span class="op">+</span><span class="va">Sex</span>,data<span class="op">=</span><span class="va">WalleyeML</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> , , Sex = F</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-out co"><span class="r-pr">#&gt;</span>       Est.Age</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Year     1