ax_1nn</span>, use_kd_tree<span class="op">=</span><span class="cn">FALSE</span><span class="op">)</span><span class="op">)</span><span class="op">)</span><span class="op">/</span><span class="va">reps</span></span></code></pre></div>
<pre><code><span><span class="co">##    user  system elapsed </span></span>
<span><span class="co">##  0.0467  0.0012  0.0481</span></span></code></pre>
</div>
</div>
<div class="section level3">
<h3 id="spherical-point-based-neighbours">Spherical point-based neighbours<a clas