module Array2:sig..end
Two-dimensional arrays. The Array2 structure provides operations
similar to those of Bigarray.Genarray, but specialized to the
case of two-dimensional arrays.
type ('a, 'b, 'c) t
The type of two-dimensional big arrays whose elements have
OCaml type 'a, representation kind 'b, and memory layout 'c.
val create : ('a, 'b) Bigarray.kind ->
'c Bigarray.layout -> int -> int -> ('a, 'b, 'c) tArray2.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.
val dim1 : ('a, 'b, 'c) t -> intReturn the first dimension of the given two-dimensional big array.
val dim2 : ('a, 'b, 'c) t -> intReturn the second dimension of the given two-dimensional big array.
val kind : ('a, 'b, 'c) t -> ('a, 'b) Bigarray.kindReturn the kind of the given big array.
val layout : ('a, 'b, 'c) t -> 'c Bigarray.layoutReturn the layout of the given big array.
val change_layout : ('a, 'b, 'c) t ->
'd Bigarray.layout -> ('a, 'b, 'd) tArray2.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.
val size_in_bytes : ('a, 'b, 'c) t -> intsize_in_bytes a is the number of elements in a
multiplied by a's Bigarray.kind_size_in_bytes.
val get : ('a, 'b, 'c) t -> int -> int -> 'aArray2.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;
otherwise, Invalid_argument is raised.
val set : ('a, 'b, 'c) t -> int -> int -> 'a -> unitArray2.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;
otherwise, Invalid_argument is raised.
val sub_left : ('a, 'b, Bigarray.c_layout) t ->
int -> int -> ('a, 'b, Bigarray.c_layout) tExtract 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.
val sub_right : ('a, 'b, Bigarray.fortran_layout) t ->
int -> int -> ('a, 'b, Bigarray.fortran_layout) tExtract 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.
val slice_left : ('a, 'b, Bigarray.c_layout) t ->
int -> ('a, 'b, Bigarray.c_layout) Bigarray.Array1.tExtract 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.
val slice_right : ('a, 'b, Bigarray.fortran_layout) t ->
int -> ('a, 'b, Bigarray.fortran_layout) Bigarray.Array1.tExtract 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.
val blit : ('a, 'b, 'c) t -> ('a, 'b, 'c) t -> unitCopy the first big array to the second big array.
See Bigarray.Genarray.blit for more details.
val fill : ('a, 'b, 'c) t -> 'a -> unitFill the given big array with the given value.
See Bigarray.Genarray.fill for more details.
val of_array : ('a, 'b) Bigarray.kind ->
'c Bigarray.layout -> 'a array array -> ('a, 'b, 'c) tBuild a two-dimensional big array initialized from the given array of arrays.
val unsafe_get : ('a, 'b, 'c) t -> int -> int -> 'aLike Bigarray.Array2.get, but bounds checking is not always
performed.
val unsafe_set : ('a, 'b, 'c) t -> int -> int -> 'a -> unitLike Bigarray.Array2.set, but bounds checking is not always
performed.