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maskvendor

data preperation and exploration

  • Code: data preprocesing and exploration.ipynb(here)
  • augmented_data.csv: 구매자별로 일자별 입력변수값 및 구매여부를 augmentation한 데이터
  • Augmented data를 사용하여 decision Tree 학습하여 시각화해본 결과, last_ordered_quantity = 0이면 구매한다라는 규칙을 학습하고 있음 (첫 번째 노드).

  • 이는 구매자 별 최초 구매시 변수값을 가지는 row는 변수 last_ordered_quantity의 값이 0이 되기 때문이며, 총 75명의 구매자가 있기에 이러한 row가 75개 있는 것으로 나타남.
  • 최초 구매 row 75줄을 제거하면 학습이 거의 되지 않음

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