| vector {base} | R Documentation |
vector produces a vector of the given length and mode.
as.vector, a generic, attempts to coerce its argument into a
vector of mode mode (the default is to coerce to whichever mode
is most convenient). The attributes of x are removed.
is.vector returns TRUE if x is a vector (of mode
logical, integer, real, complex, character or list if not specified)
and FALSE otherwise.
vector(mode = "logical", length = 0) as.vector(x, mode = "any") is.vector(x, mode = "any")
mode |
A character string giving an atomic mode, or "any". |
length |
A non-negative integer specifying the desired length. |
x |
An object. |
is.vector returns FALSE if x has any attributes
except names. (This is incompatible with S.) On the other hand,
as.vector removes all attributes including names.
Note that factors are not vectors; is.vector returns
FALSE and as.vector converts to character mode.
For vector, a vector of the given length and mode. Logical
vector elements are initialized to FALSE, numeric vector
elements to 0 and character vector elements to "".
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
c, is.numeric, is.list, etc.
df <- data.frame(x=1:3, y=5:7) ## Not run: ## Error: as.vector(data.frame(x=1:3, y=5:7), mode="numeric") ## End(Not run) x <- c(a = 1, b = 2) is.vector(x) as.vector(x) all.equal(x, as.vector(x)) ## FALSE ###-- All the following are TRUE: is.list(df) ! is.vector(df) ! is.vector(df, mode="list") is.vector(list(), mode="list") is.vector(NULL, mode="NULL")