ransformations with functions from packages <code>"sdam"</code> and <code>"multiplex"</code> to be able to plot the shipwrecks network as a directed graph with loops with a force directed layout.</p>
<div class="sourceCode" id="cb14"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span class="co"># graph of shipwrecks network</span>
<span class="va">sw</span><span class="op">[</span>, <span class="fl">20</span><span class="op">:</span><span class="fl">21</span><span class="op">]</span> |&gt; 