April 2019
Beginner to intermediate
480 pages
12h 34m
Korean
Content preview from 파이썬 라이브러리를 활용한 머신러닝(번역개정판): 사이킷런 핵심 개발자가 쓴 머신러닝과 데이터 과학 실무서
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2
장
지도 학습
161
옵션인 ‘
sgd
’가 있습니다. ‘
sgd
’ 옵션은 다른 여러 매개변수와 함께 튜닝하여 최선의 결과를 만
들 수 있습니다.
78
사용자 가이드에서 이런 매개변수들과 정의를 찾을 수 있습니다.
MLP
를 처
음 사용할 때는 ‘
adam
’과 ‘
lbfgs
’를 추천합니다.
79
NOTE
_
fit
메서드는 모델을 다시 만듭니다.
scikit
-
learn
모델의 중요한 특징 하나는
fit
메서드를 호출하면
이전에 학습한 것을 모두 초기화하는 점입니다. 그래서 어떤 데이터셋으로 모델을 만들고 나서 다른 데이터셋
을 사용해
fit
메서드를 호출하면 첫 번째 데이터셋에서 학습한 것을 모두 잃어버립니다. 한 모델에서 원하는
만큼
fit
메서드를 호출할 수 있으며 그 결과는 새로운 모델 객체에서
fit
메서드를 호출하는 것과 같습니다.
80
2.4
분류 예측의 불확실성 추정
아직까지 이야기하지 않았는데,
scikit
-
learn
에서 많이 사용하는 인터페이스 중 하나는 분류
기에 예측의 불확실성을 추정할 수 있는 기능입니다. 어떤 테스트 포인트에 대해 분류기가 예
측한 클래스가 무엇인지 뿐만 아니라 정확한 클래스임을 얼마나 확신하는지가 중요할 때가 많
습니다. 실제 애플리케이션에서는 오류의 종류에 따라 전혀 다른 결과를 만듭니다. 암을 진료
하는 의료 애플리케이션을 생각해보겠습니다. ...
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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.