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[MIS¼¼¹Ì³ª]R±³Àç 46_56
°ü¸®ÀÚ 15-09-09 10:37 989
2Àå µ¥ÀÌÅÍŸÀÔ (p.46 ºÎÅÍ)
mean(x <- c(1,2,3))
x
mean(y = c(1,2,3))
y
x
a<-3
b<-4.5
c<-a+b
c
print(c)
## factor¶õ ¹üÁÖÇü(nominal) º¯¼öÀÓ
gender <- factor("³²", c("³²", "¿©"))  ## gender¶ó´Â ¹üÁÖÇüº¯¼ö¿¡ "³²"À̶ó´Â °ªÀ» ÇÒ´çÇÔ
gender
nlevels(gender)  ## ·¹º§(¹üÁÖ³» elelments)ÀÇ ¼ö
levels(gender)  ## ·¹º§ÀÇ ¸ñ·Ï
help(factor)
ff <- factor(substring("statistics", 1:10, 1:6), levels = letters)
ff
(ff <- factor(substring("statistics", 1:10, 1:6), levels = letters))
(ff <- factor(substring("statistics123", 1:12, 1:12), levels = letters))
## ordered ¶õ ¼ø¼­Çü º¯¼ö
ordered("a", c("a", "b", "c"))
A <- c("a","b","c")   ## À̶§ A´Â ÁýÇÕÀÌ µÇ´Â °ÍÀÌ
ordered("c", A)
ordered("d", A)