Ledger Nano X - The secure hardware wallet
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  1. ###########
  2.  
  3. def moyenne(l, cent):
  4.     n = len(l)
  5.     if n == 0:return float("inf")
  6.     s = 0
  7.     for i in range(n):
  8.         s += distance(cent, l[i])
  9.     return s/n
  10.  
  11.  
  12. def centroide(l):
  13.     if len(l) == 0:return [0,0]
  14.     xs = 0
  15.     ys = 0
  16.     for p in l:
  17.         xs += p[0]
  18.         ys += p[1]
  19.    
  20.     return [xs/len(l),ys/len(l)]
  21.  
  22.  
  23. def distance(p1,p2):
  24.     i = p1[0] - p2[0]
  25.     j = p1[1] - p2[1]
  26.     return sqrt(i*i + j*j)
  27.  
  28. def metrique(z):
  29.     somme = 0
  30.     for i in range(len(z)):
  31.         formule = []
  32.         centI = centroide(z[i])
  33.         sigmaI = moyenne(z[i], centI)
  34.         for j in range(len(z)):
  35.             if (i==j):continue
  36.             centJ = centroide(z[j])
  37.             sigmaJ = moyenne(z[j], centJ)
  38.             d = distance(centI,centJ)
  39.             # division par 0
  40.             if  d > 1e-8:
  41.                 formule.append((sigmaI+sigmaJ)/d)
  42.             else:
  43.                 return float("inf")
  44.         if formule:
  45.             somme += max(formule)
  46.    
  47.     return somme/7
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