an class="co">#     1    4    3    6 </span></span>
<span><span class="co">#  attr(,"class")</span></span>
<span><span class="co">#  [1] "bbox"</span></span></code></pre></div>
</div>
<div class="section level4">
<h4 id="sf_linestring">sf_LINESTRING<a class="anchor" aria-label="anchor" href="#sf_linestring"></a>
</h4>
<div class="sourceCode" id="cb3"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span></span>
<span><span class="fu">cppFunction</span><span class="op">(</span></span>
<span>  i