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don’t format an int as float…

diff --git a/sim.py b/sim.py
--- a/sim.py
+++ b/sim.py
@@ -502,7 +502,7 @@ if __name__ == "__main__":
         if i % 10 and i != 1: 
             continue
         succ = len([r for r in routelen if r < 20])/len(routelen)
-        pl.hist(linklen, 10000, cumulative=True, normed=True, histtype='step', label=str(run) + ", " + "{:.2f}".format(i*foldperstep) + ", len: " + "{:.2f}".format(np.mean(routelen)) + ", succ: " + "{:.2f}".format(succ))
+        pl.hist(linklen, 10000, cumulative=True, normed=True, histtype='step', label=str(run) + ", " + "{:}".format(i*foldperstep) + ", len: " + "{:.2f}".format(np.mean(routelen)) + ", succ: " + "{:.2f}".format(succ))
         pl.semilogx()
     pl.legend(loc="upper left")
     pl.title(str(args.size) + " nodes, " + str(args.connections) + " connections per node, optimized with strategy " + args.strategy)