Now uses floating point.

Author: Emi Nomura

brainx/util.py

@@ -61,8 +61,8 @@ def format_matrix2(data,s,sc,c,lk,co,idc = [],costlist=[],nouptri = False):
 
 def cost_size(nnodes):
     tot_edges = .5*nnodes*(nnodes-1)
-
-    costs =  np.array(range(tot_edges+1),dtype=float)/tot_edges
+    
+    costs =  np.array(range(int(tot_edges)+1),dtype=float)/tot_edges
     edges_short = tot_edges/2
     return costs,tot_edges,edges_short