pr">#&gt;</span>  $ fl : int  19 20 20 20 23 24 25 28 20 22 ...</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>  $ age: int  2 2 2 2 2 2 2 2 3 3 ...</span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/utils/head.html" class="external-link">head</a></span><span class="op">(</span><span class="va">Morwong4</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   fl age</span>
<span class="r-out co"><span class="r-pr">#&gt;</sp