R unique()

1 개요

R unique()

• "Extract Unique Elements → 유니크 요소 추출"

a <- c(1,4,5,4,4,3,2,1) 
b <- unique(a)
b

unique(c(1,2,2,3,3,3,4))

unique(c(1,2,2,NA,3,3,3,4))

unique(iris$Species)

2 같이 보기

• R rle()
• R table()
• R match()
• R 원핫 인코딩
• R duplicated()
• 함수 array_unique()

3 참고

• https://www.rdocumentation.org/packages/base/versions/3.6.2/topics/unique