title: Division by zero while trying to plot in Netlogo
body: <p>I'm fairly new to Netlogo and I'm trying to do a plot for my model. I
  want to plot the average of links with respect to turtles (count links) / (count
  turtles).</p>
  
  <p>When I click on setup for the model though this message appears</p>
  
  <p>Division by zero.
     error while observer running /
     called by plot 'Promedio conexiones para cada agente' pen 'Prom. Conex.'
     update code
     called by __CLEAR-ALL-AND-RESET-TICKS
     called by procedure SETUP
     called by Button 'setup'</p>
  
  <p>It seems during setup it counts 0 turtles even though setup creates 5 turtles initially. But it apparently trie to plot something before setup finishes. Any ideas why this is happening. I put my code on the update field and nothing
  on the setup field.</p>
  
  <p>Thanks!</p>