December 2024
Beginner to intermediate
336 pages
7h 41m
Korean
Content preview from 로우코드 AI
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135
5
장
AutoML로 사기 거래 탐지하기
흥미로운 부분이 바로 보일 것입니다. 오직
CASH
_
OUT
과
TRANSFER
라는 두 가지의 거래 유형에
서만 사기 거래가 존재한다는 사실입니다. 실제로 그러한지 다음 코드로 한 번 더 확인해 보죠.
transaction_df.groupby('type')['isFraud'].value_counts()
그러면 각 값 조합이 나타나는 횟수가 출력됩니다. 출력은 [표
5
-
4
]와 유사합니다.
표
5-4
value
_
counts
()
메서드의 출력
type isFraud count
CASH_IN 0 1399284
CASH_OUT 0 2233384
1 4116
DEBIT 0 41432
PAYMENT 0 2151495
TRANSFER 0 528812
1 4097
오직 두 거래 유형에서만 사기 거래가 존재함을 재차 확인할 수 있습니다. 만약 이 데이터셋이
실제 상황을 잘 대변한다면,
type
은 매우 유용한 특징이 될 수 있습니다. 그러나 새로운 유형
의 사기 거래가 등장한다면, 이미 학습된 모델은 본 적이 없는 유형을 완전히 놓쳐버릴 가능성
도 존재합니다.
NOTE
사기 거래 유형을 모니터링하고 필요에 따라 모델의 재학습을 고려해야만 합니다. 이 내용을
이 책에서 다루지는 않지만, 알아두면 좋은 개념입니다.
수치형 특징값을 구간별로 나누어 구간별로 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.