timtyler comments on More intuitive explanations! - Less Wrong

22 Post author: XiXiDu 06 January 2012 06:10PM

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Comment author: timtyler 06 January 2012 07:49:29PM * 3 points [-]

FWIW, there's a nice proof of Bayes' theorem in Russel and Norvig's textbook, which I haven't seen posted here yet.

Comment author: malthrin 07 January 2012 12:05:01AM 6 points [-]

Is this the one you meant?

P(A & B) = P(B | A) * P(A) = P(A | B) * P(B)

Hold the second two statements equal and divide by P(A):

P(B | A) = P(A | B) * P(B) / P(A)

Comment author: timtyler 07 January 2012 02:43:59PM * 0 points [-]

Yes - though the accompanying text helped quite a bit too.