href="https://rdrr.io/r/stats/sd.html" class="external-link">sd</a></span><span class="op">(</span><span class="va">weight</span><span class="op">)</span><span class="op">)</span>,</span>
<span>    .messages <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span></span>
<span>      <span class="st">"average height: {mean_height}"</span>,</span>
<span>      <span class="st">"average weight: {mean_weight}"</span></span>
<sp