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# Bigarray.Array1.3o - Man Page

One-dimensional arrays.

## Module

Module   Bigarray.Array1

## Documentation

Module Array1
: sig end

One-dimensional arrays. The Array1 structure provides operations similar to those of Bigarray.Genarray , but specialized to the case of one-dimensional arrays. (The Bigarray.Array2 and Bigarray.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

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

val create : ('a, 'b) Bigarray.kind -> 'c Bigarray.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 Bigarray.Genarray.create .

val init : ('a, 'b) Bigarray.kind -> 'c Bigarray.layout -> int -> (int -> 'a) -> ('a, 'b, 'c) t

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

Each element Array1.get b i of the array is initialized to the result of f i .

In other words, Array1.init kind layout dimensions f tabulates the results of f applied to the indices of a new Bigarray whose layout is described by kind , layout and dim .

Since 4.12

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

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

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

Return the kind of the given Bigarray.

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

Return the layout of the given Bigarray.

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

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

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

Since 4.03

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 .  Otherwise, Invalid_argument is raised.

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 ; otherwise, Invalid_argument is raised.

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

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

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

Extract a scalar (zero-dimensional slice) of the given one-dimensional Bigarray.  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 4.05

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

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

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

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

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

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

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.

## Referenced By

2024-06-19 OCamldoc OCaml library