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(* ocamlgsl - OCaml interface to GSL *)
(* Copyright () 2002 - Olivier Andrieu *)
(* distributed under the terms of the GPL version 2 *)
open Bigarray
type double_mat_bigarr =
(float, Bigarray.float64_elt, Bigarray.c_layout) Bigarray.Array2.t
type matrix = double_mat_bigarr
let create ?init dimx dimy =
let barr = Array2.create float64 c_layout dimx dimy in
begin match init with
| None -> ()
| Some x -> Array2.fill barr x
end ;
barr
let dims mat =
(Array2.dim1 mat, Array2.dim2 mat)
let of_array arr dim1 dim2 =
let mat = create dim1 dim2 in
for i=0 to pred dim1 do
for j=0 to pred dim2 do
mat.{i,j} <- arr.(dim2*i+j)
done
done ;
mat
let of_arrays arr =
Array2.of_array float64 c_layout arr
let to_array (mat : matrix) =
let d1 = Array2.dim1 mat in
let d2 = Array2.dim2 mat in
Array.init (d1*d2) (fun i -> mat.{i/d2, i mod d2})
let to_arrays (mat : matrix) =
let d1 = Array2.dim1 mat in
let d2 = Array2.dim2 mat in
let a = Array.init d1 (fun _ -> Array.make d2 0.) in
for i=0 to pred d1 do
for j=0 to pred d2 do
a.(i).(j) <- mat.{i,j}
done
done ;
a
let get (m : matrix) i j = Array2.get m i j
let set (m : matrix) i j x = Array2.set m i j x
let set_all = Array2.fill
let set_zero m = set_all m 0.
let set_id m =
set_zero m ;
for i=0 to pred (min (Array2.dim1 m) (Array2.dim2 m)) do
set m i i 1.
done
let memcpy ~src ~dst =
Array2.blit src dst
let copy m =
let m' = create (Array2.dim1 m) (Array2.dim2 m) in
Array2.blit m m' ;
m'
external add : matrix -> matrix -> unit = "ml_gsl_matrix_add"
external sub : matrix -> matrix -> unit = "ml_gsl_matrix_sub"
external mul_elements : matrix -> matrix -> unit = "ml_gsl_matrix_mul"
external div_elements : matrix -> matrix -> unit = "ml_gsl_matrix_div"
external scale : matrix -> float -> unit = "ml_gsl_matrix_scale"
external add_constant : matrix -> float -> unit = "ml_gsl_matrix_add_constant"
external add_diagonal : matrix -> float -> unit = "ml_gsl_matrix_add_diagonal"
external is_null : matrix -> bool = "ml_gsl_matrix_isnull"
external swap_rows : matrix -> int -> int -> unit = "ml_gsl_matrix_swap_rows"
external swap_columns : matrix -> int -> int -> unit = "ml_gsl_matrix_swap_columns"
external swap_rowcol : matrix -> int -> int -> unit = "ml_gsl_matrix_swap_rowcol"
external transpose : matrix -> matrix -> unit = "ml_gsl_matrix_transpose_memcpy"
external transpose_in_place : matrix -> unit = "ml_gsl_matrix_transpose"
let row =
Array2.slice_left
module Single =
struct
type float_mat_bigarr =
(float, Bigarray.float32_elt, Bigarray.c_layout) Bigarray.Array2.t
type matrix = float_mat_bigarr
let create ?init dimx dimy =
let barr = Array2.create float32 c_layout dimx dimy in
begin match init with
| None -> ()
| Some x -> Array2.fill barr x
end ;
barr
let dims = dims
let of_array arr dim1 dim2 =
let mat = create dim1 dim2 in
for i=0 to pred dim1 do
for j=0 to pred dim2 do
mat.{i,j} <- arr.(dim2*i+j)
done
done ;
mat
let of_arrays arr =
Array2.of_array float32 c_layout arr
let to_array (mat : matrix) =
let d1 = Array2.dim1 mat in
let d2 = Array2.dim2 mat in
Array.init (d1*d2) (fun i -> mat.{i/d2, i mod d2})
let to_arrays (mat : matrix) =
let d1 = Array2.dim1 mat in
let d2 = Array2.dim2 mat in
let a = Array.init d1 (fun _ -> Array.make d2 0.) in
for i=0 to pred d1 do
for j=0 to pred d2 do
a.(i).(j) <- mat.{i,j}
done
done ;
a
let get (m : matrix) i j = Array2.get m i j
let set (m : matrix) i j x = Array2.set m i j x
let set_all = set_all
let set_zero = set_zero
let set_id m =
set_zero m ;
for i=0 to pred (min (Array2.dim1 m) (Array2.dim2 m)) do
set m i i 1.
done
let memcpy = memcpy
let copy m =
let m' = create (Array2.dim1 m) (Array2.dim2 m) in
Array2.blit m m' ;
m'
let row = row
external add : matrix -> matrix -> unit = "ml_gsl_matrix_float_add"
external sub : matrix -> matrix -> unit = "ml_gsl_matrix_float_sub"
external mul_elements : matrix -> matrix -> unit = "ml_gsl_matrix_float_mul"
external div_elements : matrix -> matrix -> unit = "ml_gsl_matrix_float_div"
external scale : matrix -> float -> unit = "ml_gsl_matrix_float_scale"
external add_constant : matrix -> float -> unit = "ml_gsl_matrix_float_add_constant"
external add_diagonal : matrix -> float -> unit = "ml_gsl_matrix_float_add_diagonal"
external is_null : matrix -> bool = "ml_gsl_matrix_float_isnull"
external swap_rows : matrix -> int -> int -> unit = "ml_gsl_matrix_float_swap_rows"
external swap_columns : matrix -> int -> int -> unit = "ml_gsl_matrix_float_swap_columns"
external swap_rowcol : matrix -> int -> int -> unit = "ml_gsl_matrix_float_swap_rowcol"
external transpose : matrix -> matrix -> unit = "ml_gsl_matrix_float_transpose_memcpy"
external transpose_in_place : matrix -> unit = "ml_gsl_matrix_float_transpose"
end
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