title: How to use Igraph with clusters and Dataframe
body: <p>I want to plot a graph with the <code>igraph</code> package.<br>
  I have a Dataframe with the output of the <code>Kmeans</code> algorithm with my data and the clusters. And I want this Dataframe to be the input of my graph in order to plot it. </p>
  
  <p>How should i do it?</p>
  
  <p>The format of my Dataframe is the next one:</p>
  
  <pre><code>Column1   : Product_Id
  Column2-90: ProductCategory (0 or 1 if this product matches or not this category)
  Column91  : Cluster: (1-20)
  </code></pre>