pkg/igraph/man/graph_from_data_frame.html">graph_from_data_frame</a></span><span class="op">(</span>d <span class="op">=</span> <span class="va">.</span><span class="op">$</span><span class="va">edges</span>, directed <span class="op">=</span> <span class="cn">FALSE</span>, vertices <span class="op">=</span> <span class="va">.</span><span class="op">$</span><span class="va">vertices</span><span class="op">)</span><span class="op">}</span>



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