a">NY89_nb_sf</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/knn2nb.html">knn2nb</a></span><span class="op">(</span><span class="fu"><a href="../reference/knearneigh.html">knearneigh</a></span><span class="op">(</span><span class="va">NY8_ct_sf</span>, k<span class="op">=</span><span class="fl">1</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=