R sapply()

1 개요

R sapply()

x <- c(2,3,4)
sapply(x, function(n) { n*n })
## [1]  4  9 16
x**2
## [1]  4  9 16

movies <- c("SPYDERMAN","BATMAN","VERTIGO","CHINATOWN")
sapply(movies, tolower)
##   SPYDERMAN      BATMAN     VERTIGO   CHINATOWN 
## "spyderman"    "batman"   "vertigo" "chinatown" 
sapply(movies, nchar)
## SPYDERMAN    BATMAN   VERTIGO CHINATOWN 
##         9         6         7         9

2 같이 보기

• R lapply()
• R colMeans()
• R apply() 패밀리
• 함수 map()

3 참고

• https://www.rdocumentation.org/packages/base/versions/3.6.0/topics/lapply