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fengdu78 / lihang-code

《统计学习方法》的代码实现
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em算法实现的一个错误 #42

Open Ga091an opened 4 years ago

Ga091an commented 4 years ago 
def pmf(i, pro_A, pro_B, por_C):
    pro_1 = pro_A * math.pow(pro_B, data[i]) * math.pow(
        (1 - pro_B), 1 - data[i])
    pro_2 = pro_A* math.pow(pro_C, data[i]) * math.pow(
        (1 - pro_C), 1 - data[i])
    return pro_1 / (pro_1 + pro_2)

第四行是不是应该改成 pro_2 = (1-pro_A) math.pow(pro_C, data[i]) math.pow( (1 - pro_C), 1 - data[i])

LIUJAING commented 2 years ago

应该是

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