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关于分类阈值问题 #71

@wl915634785

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@wl915634785

如果阈值为0.5,我不太理解。因为样本是0和1,所以预测值也应该接近0和1,那么经过sigmod以后不都是应该大于0.5吗,是不是意味着某个样本将会属于所有类别

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