May 2022
Beginner to intermediate
448 pages
13h 7m
Korean
book
밑바닥부터 시작하는 데이터 과학 데이터 분석을 위한 파이썬 프로그래밍과 수학·통계 기초
by Joel Grus, Hangyeol Kim, Seongju Ha, Eunjung Park
Content preview from 밑바닥부터 시작하는 데이터 과학 데이터 분석을 위한 파이썬 프로그래밍과 수학·통계 기초
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from Scratch
221
beta
_
10 = least
_
squares
_
fit
_
ridge(inputs, daily
_
minutes
_
good,10, # alpha
learning
_
rate, 5000, 25)
# [28.3, 0.67, -0.90, -0.01]
assert 1 < dot(beta
_
10[1:], beta
_
10[1:]) < 2
assert 0.5 < multiple
_
r
_
squared(inputs, daily
_
minutes
_
good, beta
_
10) < 0.6
자세히 살펴보면 페널티가 증가하면 박사 학위 취득 여부의 계수는 줄어들어 사
라지는 것을 확인할 수 있다. 즉, 박사 학위 취득 여부의 계수가
0
과 유의하게 다
르지 않다는 결과를 재차 확인했다.
Regularization을 적용하기 전에
rescale
을 통해 데이터의 척도를 조절하자. 만약 경력
의 척도를 100년 단위로 바꾸면 경력에 해당하는 변수의 계수는 100배 증가할 것이고, 똑
같은 모델이라도 페널티는 증가할 것이다.
또한 다음과 같이 다른 형태의 페널티를 사용하는 라쏘 회귀(
lasso
regression
)
라는 방법도 있다.
def lasso
_
penalty(beta, alpha):
return alpha * sum(abs(beta
_
i) for beta
_
i in ...
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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.