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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5
장
모델 평가와 성능 향상
335
그림
5-4
레이블에 기반한
GroupKFold
분할
scikit
-
learn
은 다양한 상황에 적용할 수 있는 많은 교차 검증 전략을 제공합니다 (
scikit
-
learn
사용자 가이드를 참고하세요.
http
://
scikit
-
learn
.
org
/
stable
/
modules
/
cross
_
validation
.
html
). 그중 기본
KFold
,
StratifiedKFold
,
GroupKFold
를 가장 널리 사용합
니다.
7
5.1.4
(한국어판 부록) 반복 교차 검증
8
데이터셋의 크기가 크지 않을 경우 안정된 검증 점수를 얻기 위해 교차 검증을 반복하여 여
러 번 수행하는 경우가 많습니다. 이를 위해
scikit
-
learn
0
.
19
버전에서
RepeatedKFold
와
RepeatedStratifiedKFold
분할기가 추가되었습니다. 이 클래스의 객체를
cross
_
val
_
score
(또는
cross
_
validate
) 함수의
cv
매개변수에 전달하여 교차 검증을 반복할 수 있습니다.
회귀에는
RepeatedKFold
를 사용하고 분류에는
RepeatedStratifiedKFold
를 사용합니다.
RepeatedKFold
는
KFold
클래스를 사용하여 훈련 폴드와 테스트 폴드를 분할합니다. 이와
비슷하게
RepeatedStratifiedKFold ...
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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.