is.numeric.atomic.vector {splus2R} | R Documentation |
The is.vector
function returns a FALSE
value in some cases where intuitively one might
expect a TRUE
value to be returned. For example,
is.vector(z)
returns FALSE
for each of the
following:
z <- 1:3;names(z) <- 1:3
z <- matrix(1:3, nrow=1)
z <- matrix(1:3, ncol=1)
These results are not necessarily incorrect, they are
just one interpretion of the definition of a vector.
Contrarily, the is.numeric.atomic.vector(z)
function returns
TRUE
for each of the above examples. Thus,
is.numeric.atomic.vector
expands the basic definition of a
vector to allow matrices containing a single row
or column and named vectors. Also, unlike is.vector
,
is.numeric.atomic.vector
returns FALSE
for objects of class list
.
is.numeric.atomic.vector(x)
x |
an object of arbitrary class. |
a vector of character strings containing the result. The length
of this vector is equal to length(x)
.
## cases where is.numeric.atomic.vector returns ## TRUE z <- 1:3;names(z) <- letters[1:3] is.numeric.atomic.vector(z) is.numeric.atomic.vector(matrix(1:3, nrow=1)) is.numeric.atomic.vector(matrix(1:3, ncol=1)) is.numeric.atomic.vector(1:5) is.numeric.atomic.vector(letters) ## cases where is.numeric.atomic.vector returns ## FALSE is.numeric.atomic.vector(list(1:3)) is.numeric.atomic.vector(data.frame(1:3,2:4)) is.numeric.atomic.vector(matrix(1:12, nrow=4))