">poly_metrics</span><span class="op">(</span></span>
<span>  <span class="va">crownarea</span>,</span>
<span>  funNames <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 class="st">"length"</span>, <span class="st">"elongation"</span>, <span class="st">"eccentricityboundingbox"</span>, <span class="st">"solidity"</span>,</span>
<span>    <span class="st">"eccentricityeigen"</span>, <span class="st">"calliper"<