R 데이터프레임 특정날짜 행 제거

1 개요

R 데이터프레임 특정날짜 행 제거

2 문제상황

df <- read.table( header=T, stringsAsFactors=FALSE, text="
day         fruit    ea
2019-06-01  apple    1
2019-06-01  apple    1
2019-06-02  banana   2
2019-06-02  apple    3
2019-06-03  banana   4
")
df$day <- as.Date(df$day)
df
##          day  fruit ea
## 1 2019-06-01  apple  1
## 2 2019-06-01  apple  1
## 3 2019-06-02 banana  2
## 4 2019-06-02  apple  3
## 5 2019-06-03 banana  4

3 방법1: R 기본연산자

df <- df[df$day != "2019-06-02",]
df
##          day  fruit ea
## 1 2019-06-01  apple  1
## 2 2019-06-01  apple  1
## 5 2019-06-03 banana  4

4 방법2: subset()

df <- subset(df, day != "2019-06-02")
df
##          day  fruit ea
## 1 2019-06-01  apple  1
## 2 2019-06-01  apple  1
## 5 2019-06-03 banana  4

5 같이 보기

• R subset()
• R 데이터 전처리
• R 데이터프레임 특정날짜 이전 행 제거