Iota

Creates an array with values increasing along the specified axis, starting from start.

nv_iota_like() is a variant where dtype, shape, ambiguous, and device default to those of like.

Usage

nv_iota(axis, dtype, shape, start = 1L, ambiguous = FALSE, device = NULL)

nv_iota_like(
  like,
  axis,
  shape = NULL,
  start = 1L,
  dtype = NULL,
  ambiguous = NULL,
  device = NULL
)

Arguments

axis

(integer(1))
Axis along which values increase. Negative values count from the end of shape, i.e. -1 refers to the last axis.

dtype

(character(1) | DataType)
Data type.

shape

(integer())
Shape.

start

(integer(1))
Starting value (default 1).

ambiguous

(logical(1))
Whether the type is ambiguous. Ambiguous types usually arise from R literals (e.g., 1L, 1.0) and follow special promotion rules. See the vignette("type-promotion") for more details.

device

(NULL | character(1) | device)
The device the data lives on, given either as:

• a device string naming the platform (e.g. "cpu", "cuda", "cuda:<n>"), which is resolved against the backend in use, or

• a device object as returned by nv_device(): a PJRTDevice for the "pjrt" backend or a quickr_device for the "quickr" backend. Because a device object is backend-specific, it also determines the backend.

The default (NULL) uses default_device(): the CPU, or the platform named by the PJRT_PLATFORM environment variable on the "pjrt" backend.

like

(AnvlArray)
Existing array whose attributes are used as defaults (only for nv_iota_like()).

Value

arrayish
Has the given dtype and shape.

See also

nv_seq() for a simpler 1-D sequence, prim_iota() for the underlying primitive.

Examples

nv_iota(axis = 1L, dtype = "i32", shape = 5L)
#> AnvlArray
#>  1
#>  2
#>  3
#>  4
#>  5
#> [ CPUi32{5} ] 
x <- nv_fill(0L, shape = c(2, 3))
nv_iota_like(x, axis = 1L)
#> AnvlArray
#>  1 1 1
#>  2 2 2
#> [ CPUi32{2,3} ]