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DozenCoder/similarity.py

Last active April 27, 2018 05:33
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用户相似度计算1
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similarity.py
# similarity method 1
sim = 0
sim = sum([math.pow(r1[i] - r2[i]) for i in item_comm])/len(item_comm)
sim = math.sqrt(sim)
sim = 1.0 - math.tanh(sim)
# similarity method 2
max_comm = min(len(user1), len(user2))
sim = sim * item_comm / max_comm
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