R factor()

1 개요

R factor()

v = c(1,2,3)
factor(v)
#[1] 1 2 3
#Levels: 1 2 3

factor(v, ordered=TRUE)
#[1] 1 2 3
#Levels: 1 < 2 < 3

factor(v, levels=c(3,2,1))
#[1] 1 2 3
#Levels: 3 2 1

v = c("blue","green","red","red","blue","blue")
factor(v)
#[1] blue  green red   red   blue  blue 
#Levels: blue green red

factor(v, ordered=TRUE)
#[1] blue  green red   red   blue  blue 
#Levels: blue < green < red

factor(v, ordered=TRUE, levels=c("blue", "red", "green"))
#[1] blue  green red   red   blue  blue 
#Levels: blue < red < green

2 같이 보기

• R ordered()
• R is.factor()
• R as.factor()

3 참고

• https://www.rdocumentation.org/packages/base/versions/3.5.3/topics/factor