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BinomialDeviance损失函数中损失函数计算错误 #6

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@zhang2010hao

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@zhang2010hao

你好,个人认为,BinomialDeviance损失函数中,计算loss的公式有问题,类似于sklearn包中的损失计算,此处的正确的公式应该是:-2.0(yf - log(1 + exp(f))),代码中是-2.0(yf - (1 + exp(f)))

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