• Terrible_Button_1763@alien.topB
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    10 months ago

    At the very least your calculation does not agree with your formula of P(X|Y) = P(X,Y)/P(Y).

    How is the numerator a calculation of P(X,Y)? [0.5 * 0.25 * 0.5] is P(a = 1 | K =1 ) * P(b = 1 | K = 1) * P(c = 0 | K = 1) which is (in Naive Bayes) P(X|Y) by Naive Bayes and not P(X, Y).

    • mofoss@alien.topB
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      10 months ago

      Uh not sure what Fubini’s theorem is, I just use the equivalence of P(X|Y)P(Y) = P(Y|X)P(X) = P(X,Y)

      • Terrible_Button_1763@alien.topB
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        10 months ago

        That’s not what the questions is asking. And that’s not Bayes’ rule. The denominator is not even calculating P(Y) under Naive Bayes.

        Hmm, maybe machine learning is not just import tensorflow/pytorch/llm.

        • mofoss@alien.topB
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          10 months ago

          Features are independent when conditioned on the dependent is pretty much what I know about Naive Bayes, I personally don’t care for the semantics.

          Also the last time I was using naive bayes was grad school 7 years ago so things are fuzzy, sorry