Module BatBigarray.Array1

One-dimensional arrays. The Array1 structure provides operations similar to those of Bigarray.Genarray, but specialized to the case of one-dimensional arrays. (The Array2 and Array3 structures below provide operations specialized for two- and three-dimensional arrays.) Statically knowing the number of dimensions of the array allows faster operations, and more precise static type-checking.

type ('a, 'b, 'c) t = ('a, 'b, 'c) Bigarray.Array1.t

The type of one-dimensional big arrays whose elements have OCaml type 'a, representation kind 'b, and memory layout 'c.

val create : ('a, 'b) kind -> 'c layout -> int -> ('a, 'b, 'c) t

Array1.create kind layout dim returns a new bigarray of one dimension, whose size is dim. kind and layout determine the array element kind and the array layout as described for Genarray.create.

val dim : ('a, 'b, 'c) t -> int

Return the size (dimension) of the given one-dimensional big array.

val kind : ('a, 'b, 'c) t -> ('a, 'b) kind

Return the kind of the given big array.

val layout : ('a, 'b, 'c) t -> 'c layout

Return the layout of the given big array.

val change_layout : ('a, 'b, 'c) t -> 'd layout -> ('a, 'b, 'd) t

Array1.change_layout a layout returns a bigarray with the specified layout, sharing the data with a (and hence having the same dimension as a). No copying of elements is involved: the new array and the original array share the same storage space.

  • since 4.06.0
val size_in_bytes : ('a, 'b, 'c) t -> int

size_in_bytes a is the number of elements in a multiplied by a's kind_size_in_bytes.

  • since 2.5.0
val get : ('a, 'b, 'c) t -> int -> 'a

Array1.get a x, or alternatively a.{x}, returns the element of a at index x. x must be greater or equal than 0 and strictly less than Array1.dim a if a has C layout. If a has Fortran layout, x must be greater or equal than 1 and less or equal than Array1.dim a.

  • raises Invalid_argument

    otherwise.

val set : ('a, 'b, 'c) t -> int -> 'a -> unit

Array1.set a x v, also written a.{x} <- v, stores the value v at index x in a. x must be inside the bounds of a as described in Bigarray.Array1.get;

  • raises Invalid_argument

    otherwise.

val sub : ('a, 'b, 'c) t -> int -> int -> ('a, 'b, 'c) t

Extract a sub-array of the given one-dimensional big array. See Genarray.sub_left for more details.

val slice : ('a, 'b, 'c) t -> int -> ('a, 'b, 'c) Array0.t

Extract a scalar (zero-dimensional slice) of the given one-dimensional big array. The integer parameter is the index of the scalar to extract. See Bigarray.Genarray.slice_left and Bigarray.Genarray.slice_right for more details.

  • since 2.7.0 and OCaml 4.05.0
val blit : ('a, 'b, 'c) t -> ('a, 'b, 'c) t -> unit

Copy the first big array to the second big array. See Genarray.blit for more details.

val fill : ('a, 'b, 'c) t -> 'a -> unit

Fill the given big array with the given value. See Genarray.fill for more details.

val of_array : ('a, 'b) kind -> 'c layout -> 'a array -> ('a, 'b, 'c) t

Build a one-dimensional big array initialized from the given array.

val map_file : Unix.file_descr -> ?pos:int64 -> ('a, 'b) kind -> 'c layout -> bool -> int -> ('a, 'b, 'c) t

Memory mapping of a file as a one-dimensional big array. See Bigarray.Genarray.map_file for more details.

val enum : ('a, 'b, 'c) t -> 'a BatEnum.t

Array1.enum e returns an enumeration on the elements of e. Contrarily to the multi-dimensional case, order of elements is specified: elements are in sequential order, from smaller to larger indices.

val of_enum : ('a, 'b) kind -> 'c layout -> 'a BatEnum.t -> ('a, 'b, 'c) t

Array1.of_enum kind layout enum returns a new one-dimensional big array of kind kind and layout layout, with elements taken from the enumeration enum in order.

  • since 2.1
val map : ('a -> 'b) -> ('b, 'c) Bigarray.kind -> ('a, 'd, 'e) t -> ('b, 'c, 'e) t

Array1.map f a applies function f to all the elements of a, and builds a Bigarray.Array1.t with the results returned by f.

val mapi : (int -> 'a -> 'b) -> ('b, 'c) Bigarray.kind -> ('a, 'd, 'e) t -> ('b, 'c, 'e) t

Same as Bigarray.Array1.map, but the function is applied to the index of the element as the first argument, and the element itself as the second argument.

val modify : ('a -> 'a) -> ('a, 'b, 'c) t -> unit

modify f a changes each element x in a to f x in-place.

val modifyi : (int -> 'a -> 'a) -> ('a, 'b, 'c) t -> unit

Same as Bigarray.Array1.modify, but the function is applied to the index of the element as the first argument, and the element itself as the second argument.

val to_array : ('a, 'b, 'c) t -> 'a array

Build a one-dimensional array initialized from the given big array.

Unsafe operations

In case of doubt, don't use them.

val unsafe_get : ('a, 'b, 'c) t -> int -> 'a

Like Bigarray.Array1.get, but bounds checking is not always performed. Use with caution and only when the program logic guarantees that the access is within bounds.

val unsafe_set : ('a, 'b, 'c) t -> int -> 'a -> unit

Like Bigarray.Array1.set, but bounds checking is not always performed. Use with caution and only when the program logic guarantees that the access is within bounds.