31
-
Tidak melakukan stemming
-
Data pada term dan query tidak dinormalisasi
-
Menggunakan semua term, termasuk stop-word
Terdapat
query
“gold silver truck” dan tiga dokumen (D=3) dengan konten
berikut:
D1: “Shipment of gold damaged in a fire”
D2:“Delivery of silver arrived in a silver truck”
D3: “Shipment of gold arrived in a truck”
Tabel 2.4 Tabel TF-IDF
Terms
Q
Counts,tf
i
Weights, wi = tfi * IDFi
D1
D2
D3
df
i
D/df
i
IDF
i
Q
D1
D2
D3
A
0
1
1
1
3
3/3=1
0
0
0
0
0
Arrived
0
0
1
1
2
3/2=1.5
0.1761
0
0
0.1761
0.1761
Damaged
0
1
0
0
1
3/1=3
0.4771
0
0.4771
0
0
Delivery
0
0
1
0
1
3/1=3
0.4771
0
0
0.4771
0
Fire
0
1
0
0
1
3/1=3
0.4771
0
0.4771
0
0
Gold
1
1
0
1
2
3/2=1.5
0.1761
0.1761
0.1761
0
0.1761
In
0
1
1
1
3
3/3=1
0
0
0
0
0
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