ink">%&gt;%</a></span> <span class="fu">add_feature_contiguity_constraints</span><span class="op">(</span><span class="va">zm8</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># solve problems</span></span></span>
<span class="r-in"><span><span class="va">s2</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/lapply.html" class="external-link">lapply</a></span><span class="op">(</span><span class