title: How to get id vertex from name vertex in R and Igraph?
body: <p>I have a graph with names from 1 to 10</p>
  
  <pre><code>library(igraph)
  library(Cairo)
  
      g&lt;- graph(c(0,1,0,4,0,9,1,7,1,9,2,9,2,3,2,5,3,6,3,9,4,5,4,8,5,8,6,7,6,8,7,8),n=10,dir=FALSE)
      V(g)$name&lt;-c(1:10)
      V(g)$label&lt;-V(g)$name
      coords &lt;- c(0,0,13.0000,0,5.9982,5.9991,7.9973,7.0009,-1.0008,11.9999,0.9993,11.0002,7.9989,13.0009,10.9989,14.0009,5.9989,14.0009,7.0000,4.0000)
      coords &lt;- matrix(coords, 10,2,byrow=T)
      plot(g,layout=coords)
  
  listMn&lt;-neighborhood(g,1,0:9)
  </code></pre>
  
  <p>I'd like to do this but in opposite way</p>
  
  <pre><code>m1&lt;-V(g)[listMn[[7]]]$name
  </code></pre>
  
  <p>the above instructions gets,</p>
  
  <pre><code>7 4 8 9
  </code></pre>
  
  <p>how to get listMn[[7]]=6 3 7 8 from names 7 4 8 9? </p>