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Informations about the package tf_idf

Tf_Idf

Sử dụng:

1.Hàm khởi tạo nhận 2 tham số TF_IDF($language, $α = 0.5, )

2.Sử dụng hàm addDocText để thêm văn bản, hàm sẽ trả về docId tương ứng với văn bản bạn vừa thêm.

3.Sử dụng hàm getTfIdf($term, $docId) để lấy giá trị tf.idf của từ trong văn bản có id tương ứng.

4.Sử dụng hàm getDocTfIdf($docId) để lấy giá trị tf.idf của văn bản có id tương ứng.

Lưu ý : Để có hiệu quả tốt

  1. Chỉ tính tf.idf với các danh từ
  2. Cộng thêm điểm cho các câu có chứa từ trong title.
  3. Áp dụng trọng số vị trí vào giá trị điểm cho bước 2 theo thang điểm [0,1]
Tham khảo

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