Module `BatBigarray.Array2`Source

Two-dimensional arrays. The Array2 structure provides operations similar to those of Bigarray.Genarray, but specialized to the case of two-dimensional arrays.

Sourcetype ('a, 'b, 'c) t = ('a, 'b, 'c) Bigarray.Array2.t

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

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

Array2.create kind layout dim1 dim2 returns a new bigarray of two dimension, whose size is dim1 in the first dimension and dim2 in the second dimension. kind and layout determine the array element kind and the array layout as described for Bigarray.Genarray.create.

Sourceval dim1 : ('a, 'b, 'c) t -> int

Return the first dimension of the given two-dimensional big array.

Sourceval dim2 : ('a, 'b, 'c) t -> int

Return the second dimension of the given two-dimensional big array.

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

Return the kind of the given big array.

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

Return the layout of the given big array.

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

Array2.change_layout a layout returns a bigarray with the specified layout, sharing the data with a (and hence having the same dimensions as a). No copying of elements is involved: the new array and the original array share the same storage space. The dimensions are reversed, such that get v [| a; b |] in C layout becomes get v [| b+1; a+1 |] in Fortran layout.

since 4.06.0

Sourceval 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

Sourceval get : ('a, 'b, 'c) t -> int -> int -> 'a

Array2.get a x y, also written a.{x,y}, returns the element of a at coordinates (x, y). x and y must be within the bounds of a, as described for Bigarray.Genarray.get;

raises Invalid_argument
otherwise.

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

Array2.set a x y v, or alternatively a.{x,y} <- v, stores the value v at coordinates (x, y) in a. x and y must be within the bounds of a, as described for Bigarray.Genarray.set;

raises Invalid_argument
otherwise.

Sourceval sub_left : ('a, 'b, c_layout) t -> int -> int -> ('a, 'b, c_layout) t

Extract a two-dimensional sub-array of the given two-dimensional big array by restricting the first dimension. See Bigarray.Genarray.sub_left for more details. Array2.sub_left applies only to arrays with C layout.

Source

val sub_right : 
  ('a, 'b, fortran_layout) t ->
  int ->
  int ->
  ('a, 'b, fortran_layout) t

Extract a two-dimensional sub-array of the given two-dimensional big array by restricting the second dimension. See Bigarray.Genarray.sub_right for more details. Array2.sub_right applies only to arrays with Fortran layout.

Sourceval slice_left : ('a, 'b, c_layout) t -> int -> ('a, 'b, c_layout) Array1.t

Extract a row (one-dimensional slice) of the given two-dimensional big array. The integer parameter is the index of the row to extract. See Bigarray.Genarray.slice_left for more details. Array2.slice_left applies only to arrays with C layout.

Source

val slice_right : 
  ('a, 'b, fortran_layout) t ->
  int ->
  ('a, 'b, fortran_layout) Array1.t

Extract a column (one-dimensional slice) of the given two-dimensional big array. The integer parameter is the index of the column to extract. See Bigarray.Genarray.slice_right for more details. Array2.slice_right applies only to arrays with Fortran layout.

Sourceval blit : ('a, 'b, 'c) t -> ('a, 'b, 'c) t -> unit

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

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

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

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

Build a two-dimensional big array initialized from the given array of arrays.

Source

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

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

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

enum e returns an enumeration on the elements of e. The order of enumeration is unspecified.

Source

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

Array2.map f a applies function f to all the elements of a, and builds a Bigarray.Array2.t with the results returned by f.

Source

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

Same as Bigarray.Array2.map, but the function is applied to the index of the element as the first two arguments, and the element itself as the third argument.

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

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

Sourceval modifyij : (int -> int -> 'a -> 'a) -> ('a, 'b, 'c) t -> unit

Same as Bigarray.Array2.modify, but the function is applied to the index of the element as the first two arguments, and the element itself as the third argument.

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

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

Unsafe operations

In case of doubt, don't use them.

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

Like Bigarray.Array2.get, but bounds checking is not always performed.

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

Like Bigarray.Array2.set, but bounds checking is not always performed.

Install

Dune Dependency

Authors

Maintainers

Sources

doc/batteries.unthreaded/BatBigarray/Array2/index.html

Module `BatBigarray.Array2`Source

Unsafe operations

package batteries

Install

Dune Dependency

Authors

Maintainers

Sources

doc/batteries.unthreaded/BatBigarray/Array2/index.html

Module BatBigarray.Array2Source

Unsafe operations

Module `BatBigarray.Array2`Source