</span>, <span class="st">"id"</span> <span class="op">)</span></span>
<span><span class="co">#    id         geometry</span></span>
<span><span class="co">#  1  1 1, 2, 3, 4, 5, 6</span></span>
<span><span class="co">#  2  2 4, 5, 6, 7, 8, 9</span></span>
<span></span>
<span><span class="fu">a_linestring</span><span class="op">(</span> <span class="va">x</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">"x"</span>,<s