e><span class="r-in"><span><span class="co"># Read connectivity files from folder and combine them</span></span></span>
<span class="r-in"><span><span class="va">combined_edge_list</span> <span class="op">&lt;-</span> <span class="fu">preprocess_graphs</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/system.file.html" class="external-link">system.file</a></span><span class="op">(</span><span class="st">"external"</span>,</span></span>
<span class="r-in"><span>                 