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
247
변수 중 일부만 선택하고 그 일부 중에서 최적의 변수를 선택하는 것이다.
#
만약
파티션
기준으로
사용할
변수가
얼마
남지
않았다면
전부
사용하자
.
if len(split
_
candidates) <= self.num
_
split
_
candidates:
sampled
_
split
_
candidates = split
_
candidates
#
아니라면
랜덤하게
변수를
선택
else:
sampled
_
split
_
candidates = random.sample(split
_
candidates,
self.num
_
split
_
candidates)
#
선택된
변수
중에서
가장
적절한
변수를
선택
best
_
attribute = min(sampled
_
split
_
candidates, key=split
_
entropy)
partitions = partition
_
by(inputs, best
_
attribute)
이런 방법은 조금 더 광범위하게는 ‘앙상블 학습(
ensemble
learning
)’의 일종인
데, 성능이 떨어지는 (그리고 대부분, 편향은 높고 분산은 낮은) 여러 모델을 동
시에 활용해서 전체적으로는 성능이 좋은 모델을 구축한다.
17.7
더 공부해 보고 싶다면
·
scikit
-
learn
에는 많은 의사결정나무
3
모델이 구현되어 ...
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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.