an class="op">(</span><span class="st">"island3"</span>, center <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="fl">20</span>, <span class="fl">80</span><span class="op">)</span>, radius <span class="op">=</span> <span class="fl">10</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">archipelago</span> <span class="op">&lt;-</span> <span class="va">island1</span> <sp