1   62   63</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [5,]   61   62   63</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [6,]   62   63   62</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">adv</span><span class="op">[[</span><span class="st">"q"</span>, <span class="st">"numeric"</span><span class="op">]</span><span class="op">]</span><span class="op"