Slide 28
Slide 28 text
PMI:MI ≈ PHSIC:HSIC
PHSIC ྨࣅͰεϜʔδϯάͨ͠ PMI ʹݟ͑Δ
PMI ͰଌΔ (x, y) ͷؔ࿈ͷྑ͞
• x = xi
∧ y = yi
ͳΔ (xi
, yi
) ͕ଘࡏ → PMI ্͕ঢ
• x = xi
⊻ y = yi
ͳΔ (xi
, yi
) ͕ଘࡏ → PMI ͕Լ
PHSIC ͰଌΔ (x, y) ͷؔ࿈ͷྑ͞
• ˜
k(x, xi
)˜
ℓ(y, yi
) > 0 ͳΔ (xi
, yi
) ͕ଘࡏ → PHSIC ্͕ঢ
ɹ “x ≈ xi
∧ y ≈ yi” ͷͱ্͖ঢ
• ˜
k(x, xi
)˜
ℓ(y, yi
) < 0 ͳΔ (xi
, yi
) ͕ଘࡏ → PHSIC ͕Լ
PMI:MI ≈ PHSIC:HSIC
MI(X,Y; Z) =
1
N
∑
i
PMI(xi
, yi; Z)
HSIC(X,Y; Z) =
1
N
∑
i
PHSIC(xi
, yi; Z)
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