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簡易的な推薦機能を実装する

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Avatar for HiroyukiYagihashi HiroyukiYagihashi
September 23, 2020
Programming
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 簡易的な推薦機能を実装する

Avatar for HiroyukiYagihashi

HiroyukiYagihashi

September 23, 2020
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Transcript

  1. 簡易的な推薦機能を実装する 八木橋拓之

  2. 内容 UserにVideoを勧める機能を作成する

  3. ロジック 1. 自分と似たUserを取得(自分が見た動画を見た User) 2. 1で取得したUserが見たVideoのidと視聴回数を取得(video_id, watch_count) 3. 2で取得したVideoを重み付け(current_userが一回見たVideoは視聴回数を0.1倍する) 4.

    2で取得したVideoのidを使ってVideoを取得 5. ページネーション&レスポンスを返却

  4. 中間テーブルを作成

  5. 1. 自分と似たUserを取得

  6. 2. Userが見たVideoを取得

  7. 3. 2で取得したVideoを重み付け

  8. 4. Videoのidを使ってVideoを取得

  9. 完成

  10. まとめとこれから • UserにVideoを勧める機能を作成した • 類似度はピアソン相関係数を使って取得したい • 意外性も考慮したい