title: Replace node names in a graph
body: <p>I have made a graph using igraph package. Node names are probe_IDs and I want to replace them with geneSYMOLs. </p>
  
  <pre><code>&gt; summary(graph)
  IGRAPH UNW- 10092 23453 -- 
  attr: name (v/c), weight (e/n)
  </code></pre>
  
  <p>and I have Unige Ids as below:</p>
  
  <pre><code>"1552263_at"   "225469_at"    "204531_s_at"  "238149_at"    "229285_at"   
  "226075_at"    "237016_at"    "1552632_a_at"
  </code></pre>
  
  <p>Can anyone help me? I have also a matrix that has each probeID with its related symbol.
  Thanks</p>