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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Data Science
74
5.1.2
산포도
산포도(
dispersion
)는 데이터가 얼마나 퍼져 있는지를 나타낸다. 보통
0
과 근접
한 값이면 데이터가 거의 퍼져 있지 않다는 의미이고 큰 값이면 매우 퍼져 있다
는 것을 의미하는 통계치다. 예를 들어 가장 큰 값과 작은 값의 차이를 나타내는
범위는 산포도를 나타내는 가장 간단한 통계치다.
#
파이썬에서
"range"
는
이미
다른
것을
의미하기
때문에
다른
이름을
사용하겠다
.
def data
_
range(xs: List[float]) -> float:
return max(xs) - min(xs)
assert data
_
range(num
_
friends) == 99
범위는
max
와
min
이 같은 경우에만
0
이 된다. 이 경우
x
의 데이터 포인트는 모두
동일한 값을 갖고 있으며 데이터가 퍼져 있지 않다는 것을 의미한다. 반대로 범
위의 값이 크다면
max
가
min
에 비해 훨씬 크다는 것을 의미하며 데이터가 더 퍼
져 있다는 것을 의미한다.
범위 또한 중앙값처럼 데이터 전체에 의존하지 않는다. 모두
0
혹은
100
으로
구성된 데이터나
0
,
100
그리고 수많은
50
으로 구성된 데이터나 동일한 범위를
갖게 된다. 하지만 첫 번째 데이터(
0
혹은
100
으로만 구성된 데이터)가 더 퍼져
있다는 느낌이 든다.
분산(
variance ...
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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.