title: How to retain the general shape of a network in igraph?
body: <p>I currently have  a network graph in igraph with which I am running simulations to see how the frequency of traits change over time like so:</p>
  
  <pre><code>  g &lt;- erdos.renyi.game(1000, 1/1000)
    V(g)$nice &lt;- sample(c(0, 1), vcount(g), replace = TRUE, prob = c(0.1, 0.9)
  </code></pre>
  
  <p>Following this I have a working code that modifies the the network across several "turns". The problem arises when I graph the network. I initially graph the network at t = 0 and once more at t = 20 or so to compare the two and see how they have changed. However, the location of the nodes have changed from the initial to the final. Is there a way that I can retain the location of the nodes in the actual graph? (i.e. so that node 4 will remain at some coordinate (a, b) despite changes in the network)</p>