title: How to choose one vertex from a Maximal Independent Set found with maximal_ivs?
body: <p>I found a list of Maximal independent sets using maximal_ivs.</p>
  
  <pre><code>max_set &lt;- maximal_ivs(grafo)
  </code></pre>
  
  <p>How can I choose one of the Maximal Independent Sets, and then, choose one vertex from that set?
  To get the name of the 3rd vertex in the 1st Set i tried:</p>
  
  <pre><code>vector&lt;- unlist(max_set[1])
  vector[3]$name 
  </code></pre>
  
  <p>But it does give an error:
  Error in vector[3]$name : </p>
  
  <pre><code>$ operator is invalid for atomic vectors
  </code></pre>
  
  <p>Is there anyway to save each Maximal independent as a new vertex sequence?</p>
  
  <p>Thanks</p>