title: Generating small world network with fixed degree
body: <p>I would like to generate a small world network with a fixed degree of 10.</p>
  
  <p>I have tried watts.strogatz.game(1, 100, 5, 0) which results in a degree of 10 but only 5 neighbours for each node. </p>
  
  <p>I'm guessing this is because the network is undirected. is there any way to make it undirected?  </p>