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- 8. 유저이탈정의
트랜잭션이발생하는경우: 실제결제, 자동결제설정, 취소
25일까지구독을적극적으로취소
이후30일동안거래가 갱신되지않는유저
training : 17년2월이탈유저
test : 17년3월이탈유저
실제제공된데이터의기간은2015년부터2월까지
그렇다면과거 데이터를통해이탈자를생성할수있지않을까?
- 14. Over‑sampling
Naive random over‑sampling(RandomOverSampler)
From random over‑sampling to SMOTE and ADASYN(SMOTE,
ADASYN)
Under‑sampling
Prototype generation(ClusterCentroids)
Prototype selection
Controlled under‑sampling techniques
RandomUnderSampler, NearMiss
Cleaning under‑sampling techniques
AllKNN, InstanceHardnessThreshold