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R에서의 그룹함수
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R에서의 그룹함수
1.
R의 그룹함수
2.
■ 그룹함수 cafe.daum.net/oracleoracle 오라클 vs
R 1. max max 2. min min 3. sum sum 4. avg mean 5. count length(세로) table (가로) 예제 : 최대월급을 출력하시오 max(emp$sal)
3.
문제56 cafe.daum.net/oracleoracle 직업이 SALESMAN 인
사원들중에 최대월급을 출력하시오
4.
문제57 cafe.daum.net/oracleoracle 30번 부서번호인 사원들
중에서 최소월급을 출력하시오
5.
문제58 cafe.daum.net/oracleoracle 직업, 직업별 최대월급을
출력하시오
6.
문제59 cafe.daum.net/oracleoracle 부서번호, 부서번호별 최소월급을
출력하시오
7.
문제60 cafe.daum.net/oracleoracle 부서번호, 직업, 부서번호별
직업별 토탈 월급 을 출력하시오
8.
문제61 cafe.daum.net/oracleoracle 부서번호, 부서번호별 최대월급을
출력하는데 부서번호별 최대월급이 높은것부터 출력하시오
9.
문제62 cafe.daum.net/oracleoracle 직업, 직업별 인원수를
출력하시오
10.
문제63 cafe.daum.net/oracleoracle 직업, 직업별 평균월급을
출력하시오
11.
문제64 cafe.daum.net/oracleoracle 입사한 년도(4자리), 입사한
년도별 토탈월급 을 출력하시오
12.
문제65 cafe.daum.net/oracleoracle 입사한 년도(4자리), 입사한
년도별 토탈월급 을 출력하시오 (가로로 출력하시오) tapply( 그룹함수에 쓸 컬럼 , 기준 컬럼명, 그룹함수)
13.
문제66 cafe.daum.net/oracleoracle 부서번호,부서번호별 토탈월급을 가로로
출력 하시오
14.
문제67 cafe.daum.net/oracleoracle 직업과 직업별 인원수를
출력하는데 세로로도 출력하고 가로로도 출력하시오 세로 : 가로 :
15.
문제68 cafe.daum.net/oracleoracle 부서번호별 직업별 토탈월급을
출력하시오
16.
문제69 cafe.daum.net/oracleoracle 아래의 결과에서 NA
를 숫자 0으로 출력하시오
17.
문제70 cafe.daum.net/oracleoracle 직업, 입사한 년도(4자리), 직업별
입사한 년도별 토탈월급을 출력하시오
18.
문제71 cafe.daum.net/oracleoracle 나이, 통신사, 나이별
통신사별 인원수를 아래와 같은 형태로 출력하시오
19.
문제72 cafe.daum.net/oracleoracle 직업(세로), 입사한 년도
4자리(가로), 직업별 입사한 년도별 토탈월급을 출력하시오
20.
문제73 cafe.daum.net/oracleoracle 아래의 결과에서 column
name 과 row name 을 각각 출력하시오
21.
문제74 cafe.daum.net/oracleoracle crime_loc.csv 를 R
로 로드를 하고 범죄유형이 살인인 범죄의 장소와 건수를 출력하시오
22.
문제75 cafe.daum.net/oracleoracle 장소(세로), 범죄(가로), 장소별
범죄별 건수를 출력하시오 아파트 집 고속도로 노상 상점 시정노점 숙박업소 병원 사무실 공장 절도 살인 강도 공갈
23.
문제76 cafe.daum.net/oracleoracle 대형마트 전통시장 서울시 물가
데이터(price.csv) 를 R 로 로드하 고 tapply 함수를 이용해서 전통시장과 대형마 트간의 물품별 가격 평균을 출력하시오 고등어 무 : : 720 500 100 120 : : : :
24.
좀더자자 좀더졸자 좀더
눕자하면 네 빈곤이 강도 같이오고 네 궁핍이 군사같이 이르리라 -잠언 6장 10절 cafe.daum.net/oracleoracle
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