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Similaire à 分類器 (ナイーブベイズ)
Similaire à 分類器 (ナイーブベイズ) (20)
分類器 (ナイーブベイズ)
- 1. - -
MATSUURA Satoshi
matsuura@is.naist.jp
1
- 11. P (CD) = P (C|D)P (D)
= P (D|C)P (C)
• D C x D
P (C|D) P (D)
• C D x C
P (D|C) P (C)
11
- 19. ick
-k 0
FIFA
hat
relew nder-2
f ye lo u c
Con fed er ar d tric
k
goal at i on s
ke hooligan
off ep er
nte ring
s i d ce
e goal
19
- 20. P (D|C) =
P (W1|C)P (W2|C) · · · P (Wn|C)
P (Wi|C) = Wi
D W
20
- 22. P (D|C)P (C)
P (C|D) =
P (D)
P (D|C) P (W1 |C)P (W2 |C) · · · P (Wn |C)
P (Wi|C) = Wi
•
★ ( )
★
22
- 23. Wa
Wb
Wc
Wx
Wy
Wa Wy Wx
Wc
Wb Wb Wa W W
W W W W W
W
bag of words bag of words
23
- 27. Wa Wz Wa
Wy Wb Wb
bag of words Wc
Wx
Wy
4
P (Cs )P (D|Cs ) P (Wa |Cs )P (Wb |Cs )P (Wy |Cs )P (Wz |Cs )
7
4 1 2 1 0
= × × × × ) Wz
7 4 4 4 4
=0
27
- 32. Wa Wz Wa
Wy Wb Wb
bag of words Wc
Wx
Wy
4
P (Cs )P (D|Cs ) P (Wa |Cs )P (Wb |Cs )P (Wy |Cs )P (Wz |Cs )
7
4 1 2 1 1
= × × × × )
7 4 4 4 10 × 7
1
=
3920
3
P (Cp )P (D|Cp ) P (Wa |Cp )P (Wb |Cp )P (Wy |Cp )P (Wz |Cp )
7
3 1 1 1 1
= × × × × )
7 3 10 × 7 10 × 7 10 × 7
1
P (Cs )P (D|Cs ) P (Cp )P (D|Cp ) =
2401000
32
- 38. • ( )
• Web+DB vol.56 p.134-142, , May. 2010.
• 4.2
• , p.101-117, , Aug, 2010.
• ( )
• http://gihyo.jp/dev/serial/01/machine-learning/0003
•
• http://d.hatena.ne.jp/kogecoo/20091103/1257281433
• ( )
• http://homepage3.nifty.com/DO/ensyu3_class2.pdf
38
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