August 2021
Beginner to intermediate
720 pages
15h 32m
Korean
Content preview from fastai와 파이토치가 만나 꽃피운 딥러닝
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377
9
테이블 데이터 모델링 깊게 알아보기
to.show(3)
state ProductGroup Drive
System Enclosure SalePrice
0 Alabama WL
#
na
#
EROPS
w
AC 11
.
097410
1 North
Carolina WL
#
na
#
EROPS
w
AC 10
.
950807
2 New
York SSL
#
na
#
OROPS 9
.
210340
하지만 출력에만 문자열로 표현될 뿐 실제는 숫자로 저장됩니다.
to.items.head(3)
state ProductGroup Drive
System Enclosure
0 1 6 0 3
1 33 6 0 3
2 32 3 0 6
범주형 열이 표현할 수 있는 고유 수준마다 숫자를 매핑하는 방식으로 간단한 변형이 이루어집
니다. 이때 새로운 수준이 등장할 때마다 하나씩 큰 숫자를 할당하므로, 사실상 숫자 자체에는
아무런 의미가 없습니다. 하지만
ProductSize
처럼 팬더스의 순서형 범주로 변환할 때는 예외
입니다. 순서가 정해진 범주형 변수여서, 순서에 따라 숫자를 부여하기 때문이죠.
classes
속
성을 살펴보면 각 범주에 매핑된 숫자를 확인할 수 있습니다.
>>> to.classes[‘ProductSize’]
(#7) [‘#na#’,’Large’,’Large / Medium’,’Medium’,’Small’,’Mini’,’Compact’] ...
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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.