이번 장에서는 먼저 범주형 특성의 보편적이고 중요한 사례를 살펴보고, 특정 모델에 잘 맞도
록 특성을 변환하는 예를 보겠습니다.
4.1
범주형 변수
예제에 사용할 데이터는
1994
년 인구 조사 데이터베이스에서 추출한 미국 성인의 소득 데이터
셋입니다.
1
이
adult
데이터셋을 사용해 어떤 근로자의 수입이
50
,
000
달러를 초과하는지, 그
이하일지를 예측하려고 합니다. 데이터셋에는 근로자 나이
age
, 고용형태
workclass
(자영업
self
-
emp
-
not
-
inc
, 사업체 근로자
private
, 공공 근로자
state
-
gov
), 교육 수준
education
, 성별
gender
, 주당 근로시간
hours
-
per
-
week
, 직업
occupation
등의 특성이 있습니다. [표
4
-
1
]은 이 데이터셋의 처음 몇 개를 보여
줍니다.
표
4-1
adult
데이터셋에 있는 처음 몇 개 샘플
ageworkclasseducationgender
hours-
per-week
occupationincome
039State-govBachelorsMale40Adm-clerical<=50K
150
Self-emp-
not-inc
BachelorsMale13Exec-managerial<=50K
238Private ...
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