Element-wise sign function: -1, 0 or 1 at the input's data type. An
unsigned input holds no negative value, so its sign is 0 or 1, like
base R's sign() on a non-negative number. You can also use sign().
Arguments
- x
(
arrayish)
One input. Can be any numeric data type. An R value materializes at its default data type.
Value
(arrayish)
Has the input's shape and data type.
See also
prim_sign() for the underlying primitive, which takes a signed
input only.
Examples
# the input's data type carries through
x <- nv_array(c(-3, 0, 5))
sign(x)
#> AnvlArray
#> -1
#> 0
#> 1
#> [ CPUf32{3} ]
# an unsigned input is 0 where it is 0 and 1 everywhere else
nv_sign(nv_array(c(0L, 3L), dtype = "ui32"))
#> AnvlArray
#> 0
#> 1
#> [ CPUui32{2} ]
# an R value materializes at its default data type
nv_sign(-3)
#> AnvlArray
#> -1
#> [ CPUf32{} ]