Théorie Baysienne de la décision Flashcards

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1
Q

Formule de Bayes (2 classes)

A

P( C | x ) = (P(C) . p( x | C) ) / p(x)

a posteriori = (a priori x vraisemblance) / évidence
p(x) = P(C1)p(x | C1) + P(C2)p(x | C2) (C Partitions de x)

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2
Q

Formule de Bayes avec plusieurs classes

A

P( Ci | x ) = (P(Ci) . p( x | Ci) ) / ∑ P(Ck)p(x | Ck)

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