R apply()

1 개요

R apply()

mydf <- read.table( header=TRUE, stringsAsFactors=FALSE, text="
English Math
     90   60
     80   70
     70   80
     60   90
")
mydf
##   English Math
## 1      90   60
## 2      80   70
## 3      70   80
## 4      60   90

colMeans(mydf)
## English    Math 
##      75      75

sapply(mydf, mean)
## English    Math 
##      75      75

apply(mydf, 2, mean)
## English    Math 
##      75      75

2 같이 보기

3 참고