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
71
num
_
points = len(num
_
friends) # 204
최댓값과 최솟값도 유용할 것이다.
largest
_
value = max(num
_
friends) # 100
smallest
_
value = min(num
_
friends) # 1
한편 최댓값과 최솟값을 구하는 문제는 정렬된 리스트의 특정 위치에 있는 값을
구하는 문제로 볼 수 있다.
sorted
_
values = sorted(num
_
friends)
smallest
_
value = sorted
_
values[0] # 1
second
_
smallest
_
value = sorted
_
values[1] # 1
second
_
largest
_
value = sorted
_
values[-2] # 49
이것은 겨우 시작에 불과하다.
5.1.1
중심 경향성
데이터의 중심이 어디 있는지를 나타내는 중심 경향성(
central
tendency
) 지표
는 매우 중요하다. 그리고 대부분의 경우, 데이터의 값을 데이터 포인트의 개수
로 나눈
평균(
average
)을 사용하게 된다.
def mean(xs: List[float]) -> float:
return sum(xs) / len(xs)
mean(num
_
friends) # 7.333333
만약 데이터 포인트가 두 개라면 평균은 두 데이터 포인트의 정중앙에 위치한 ...
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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.