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假设概论P(S)=0.5的一点疑问 #1

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gausszh opened this issue Jul 14, 2013 · 0 comments

gausszh commented Jul 14, 2013

          p(s|w1)p(s|w2)...p(s|w15)

p = ---------------------------------------------------------------
p(s|w1)p(s|w2)...p(s|w15) + (1-p(s|w1))(1-p(s|w2)...(1-p(s|w15)))

一开始，我们假定P(S)=0.5。但是随着邮件的处理，这个P(S)是否应该做出修正，但是推导上面公式的时候也是基于P(S)=0.5。所以，如果P(S)修正了，这个公式也就不成立了？？？？？？？

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