Remove "names" or "dimnames"
DESCRIPTION:
Remove the names or dimnames of an object.
USAGE:
unname(obj)
REQUIRED ARGUMENTS:
- obj
-
an object for which you want to remove the names or dimnames.
VALUE:
Object like
obj
, but without names or dimnames.
EXAMPLES:
x <- fuel.frame$Weight
y <- factor(cut(x, seq(min(x), max(x), length=6)))
z <- table(y)
z # names are longer than the data
unname(z)
# Some calculations are substantially faster if you remove names
# from input vectors first.
z1 <- runif(1000)
names(z1) <- as.character(1:1000)
sys.time(for(i in 1:1000) z1[i] <- z1[i]) # .219 seconds
z1 <- unname(z1)
sys.time(for(i in 1:1000) z1[i] <- z1[i]) # .062 seconds