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개발자를 위한 필수 수학
book

개발자를 위한 필수 수학

by 토머스 닐드, 박해선
June 2024
Beginner to intermediate
352 pages
9h 29m
Korean
Hanbit Media, Inc.
Content preview from 개발자를 위한 필수 수학
214
개발자를 위한 필수 수학
예제
5-22
선형 회귀에
3
-폴드 교차 검증 사용하기
import
pandas
as
pd
from
sklearn.linear_model
import
LinearRegression
from
sklearn.model_selection
import
KFold,
cross_val_score
df
=
pd.read_csv('https://bit.ly/3cIH97A',
delimiter=",")
# (마지막 열을 제외한 모든 열을) 입력 변수로 추출합니다.
X
=
df.values[:,
:-1]
# 마지막 열을 출력으로 추출합니다.
Y
=
df.values[:,
-1]
# 단순 선형 회귀를 수행합니다.
kfold
=
KFold(n_splits=3,
random_state=7,
shuffle=True)
model
=
LinearRegression()
results
=
cross_val_score(model,
X,
Y,
cv=kfold)
print(results)
print("MSE: 평균=%.3f (표준 편차-%.3f)"
%
(results.mean(),
results.std()))
훈련/테스트 분할은 반드시
1
/
3
이어야 하나요?
교차 검증에서
3
-폴드를 사용할 필요는 없습니다.
k
-폴드 교차 검증
k
-
fold
cross
validation
을 사용해
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Publisher Resources

ISBN: 9791169212502