s="r-out co"><span class="r-pr">#&gt;</span> 2       2   c 3, 4, 2, 1</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co">## 'val' column converted to a list</span></span></span>
<span class="r-in"><span><span class="fu">sf_linestring</span><span class="op">(</span> <span class="va">x</span>, linestring_id <span class="op">=</span> <span class="st">"id"</span>, x <span class="op">=</span> <span class="st">"x"</span>, y <span class="op">=</span> <span class="st">"y"</span