Tesis Ingenieria Software

8/19/2019 Tesis Ingenieria Software

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ci


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F


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d,i

i d

i i


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di i d̄ n

N

TF d,i i d

DF i i

wi = T F

d,i.IDF

i .NORM

T F

d,i IDF

i NORM

n : none = T F d,i n : none = 1 n : none = 1

b : binary = 1 t : tfidf = log( N DF i

) c : cosine = 1 i(TF

d,iIDF

i )2

m : max − norm = TF d,imaxi(TF d,i)

a : aug − norm = 0,5 + 0,5 TF d,i

maxi(TF d,i)

l : log = 1 + log(T F d,i)


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n t

c

i

TF d,i log( N DF i

)


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T F

d1 dj dn

c1 a11 a1j a1n

ci ai1 aij ain

cm am1 ami amn

C c1 cm

D d1 dn

a11 amn

Φ Φ : D × C → {T, F }

Φ d j ci T d j

ci Φ d j ci F ci

Φ Φ Φ Φ


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ci

ci

ci

C D

Φ d j ci d j ci ∈ D C

D


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h D C T F

h D C

ci


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ci

T P i F P i

F N i T N i

ci

TP i

ci

FP i

ci

TN i

ci

FN i

ci

N i = T P i + FP i + TN i + FN i

Precisioni TP i

(TP i+FP i)

Recalli TP i

(TP i+FN i)

Accuracyi (TP i+TN i)

N i

Errori (FP i+FN i)

N i= 1 − Accuracyi


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N

α (0 ≤ α ≤ 1)

Fα = 1

α 1Precision

+ (1 − α) 1Recall

α α

α = 1 F α α = 0

F α α = 0,5

F 1

TP FP TN FN


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T

T

T T T

T

T

T

T T

χ2

T

T

T


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Tesis Ingenieria Software