remove np.array in cMeans

pyFTS/partitioners/CMeans.py

@@ -87,11 +87,11 @@ class CMeansPartitioner(partitioner.Partitioner):
         kwargs = {'type': self.type, 'variable': self.variable}
 
         centroides = c_means(self.partitions, data, 1)
+        centroides = [v[0] for v in centroides]
         centroides.append(self.max)
         centroides.append(self.min)
-        centroides = list(set(centroides))
         centroides.sort()
-        for c in np.arange(1, len(centroides) - 1):
+        for c in range(1, len(centroides) - 1):
             _name = self.get_name(c)
             sets[_name] = FuzzySet.FuzzySet(_name, Membership.trimf,
                                  [round(centroides[c - 1], 3), round(centroides[c], 3), round(centroides[c + 1], 3)],