Identitas Mahasiswa
NIM: 2302050856
Nama: Laila Nur Aulia
Prodi: Sistem Informasi
Kelas: SI-A
Data Rating Film
| User | Interstellar | Inception | Titanic | Avatar | Matrix |
|---|---|---|---|---|---|
| U1 | 5 | 5 | 3 | 4 | 4 |
| U2 | 4 | 4 | 5 | 5 | 0 |
| U3 | 5 | 4 | 2 | 3 | 4 |
| U4 | 0 | 0 | 4 | 5 | 2 |
| U5 | 3 | 3 | 4 | 4 | 4 |
| U6 | 4 | 5 | 0 | 2 | 5 |
| U7 | 2 | 3 | 5 | 5 | 1 |
| U8 | 5 | 5 | 2 | 1 | 4 |
| U9 | 4 | 4 | 4 | 5 | 2 |
| U10 | 3 | 2 | 1 | 2 | 3 |
| U11 | 1 | 1 | 5 | 5 | 1 |
| U12 | 5 | 5 | 0 | 0 | 5 |
| U13 | 4 | 4 | 4 | 3 | 3 |
| U14 | 0 | 0 | 3 | 5 | 1 |
| U15 | 3 | 2 | 2 | 2 | 2 |
| U16 | 5 | 5 | 0 | 1 | 5 |
| U17 | 4 | 5 | 1 | 2 | 5 |
| U18 | 2 | 2 | 4 | 4 | 1 |
| U19 | 3 | 3 | 5 | 5 | 2 |
| U20 | 5 | 4 | 1 | 1 | 4 |
Hasil Prediksi
Prediksi rating U6 terhadap Titanic (Item-Based Collaborative Filtering):
3.86
Penjelasan Metode
Item-Based Collaborative Filtering memprediksi rating dengan menghitung kemiripan antar item.
Rumus Prediksi
Dengan metode Item-Based Collaborative Filtering, rumus prediksi rating U6 terhadap Titanic adalah:
$$ \hat{r}_{U6, \text{Titanic}} = \frac{ \sum_{i \in I} \text{sim}(\text{Titanic}, i) \cdot r_{U6,i} }{ \sum_{i \in I} |\text{sim}(\text{Titanic}, i)| } $$
Contoh dalam kasus:
$$
\hat{r}_{U6, \text{Titanic}} = \frac{
\text{sim}(T, I) \cdot r_{U6, I} +
\text{sim}(T, N) \cdot r_{U6, N} +
\text{sim}(T, A) \cdot r_{U6, A} +
\text{sim}(T, M) \cdot r_{U6, M}
}{
|\text{sim}(T, I)| +
|\text{sim}(T, N)| +
|\text{sim}(T, A)| +
|\text{sim}(T, M)|
}
$$