August 2024
Beginner to intermediate
640 pages
14h 53m
Korean
Content preview from AI를 위한 필수 수학
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140
AI
를 위한 필수 수학
3.7.2
의사 결정 트리
의사 결정 트리
decision
tree
는 불리언 변수
boolean
variable
를 입력으로 받는 함수로 대출 승인 여부,
COVID
-
19
감염 여부와 같은 결정을 출력값으로 반환한다. 불리언 변수란 참(또는
1
) 또는
거짓 (또는
0
) 값만 취할 수 있는 변수다. 불리언 변수 간 연산은 더하거나 곱하는 것이 아닌 논
리 연산자인
or
,
and
,
not
을 이용한다.
하지만 원래 데이터셋의 피처가 불리언 변수로 주어지지 않은 경우에는 어떻게 해야 할까? 모
델에 입력하기 전에 불리언 변수로 변환해야 한다. 예를 들어 [그림
3
-
17
]의 의사 결정 트리는
Fish
Market
데이터셋으로 학습한 회귀 트리다. 이 트리는 원시 데이터를 입력으로 받지만 트
리를 표현하는 함수는 불리언 변수로 변환된 새로운 피처에 대해 작동한다. 자세한 내용은 주
피터 노트북
69
을 참고하자.
1
.
a1
=
(
Width
≤
5
.
117
)
2
.
a2
=
(
Length3
≤
59
.
55
)
3
.
a3
=
(
Length3
≤
41
.
1
)
4
.
a4
=
(
Length3
≤
34
.
9
)
5
.
a5
=
(
Length3
≤
27
.
95
)
6
.
a6
=
(
Length3
≤
21
.
25
)
69
옮긴이_ 주피터 노트북은 옮긴이의
Github
에서 확인할 수 ...
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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.
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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.