umeric index of the vertex.</li>
<li>Added the <code>niter</code> or “number of iterations” input field for <code>FR</code> and <code>GraphOpt</code> plots.</li>
<li>Added the <code>charge</code>, <code>mass</code>, <code>spring.length</code> and <code>spring.constant</code> input fields for <code>GraphOpt</code> plots.</li>
</ul><p><br>Refer to <code>igraph</code> documentation for further information on layout parameters at <a href="https://igraph.org/r/doc/layout_with_fr.html" class="external-link ur