fftw3 0.8 · OCaml Package

FFT of Bigarray.Array1.

val create : 
  ('a, 'b) Bigarray.kind ->
  'c Bigarray.layout ->
  int ->
  ('a, 'b, 'c) Bigarray.Array1.t

See Fftw3.Sig.Genarray.create.

val of_array : 
  ('a, 'b) Bigarray.kind ->
  'c Bigarray.layout ->
  'a array ->
  ('a, 'b, 'c) Bigarray.Array1.t

of_array kind layout a build a one-dimensional aligned big array initialized from the given array.

type 'l complex_array = (Complex.t, complex_elt, 'l) Bigarray.Array1.t

Double precision complex 1D array.

type 'l float_array = (float, float_elt, 'l) Bigarray.Array1.t

Double precision float 1D array.

val dft : 
  dir ->
  ?meas:measure ->
  ?destroy_input:bool ->
  ?unaligned:bool ->
  ?howmany_n:int array ->
  ?howmanyi:int list ->
  ?ni:int ->
  ?ofsi:int ->
  ?inci:int ->
  'l complex_array ->
  ?howmanyo:int list ->
  ?no:int ->
  ?ofso:int ->
  ?inco:int ->
  'l complex_array ->
  c2c plan

dft dir x y returns a plan to compute the DFT of x and store it in y.

The parameters meas, destroy_input, unaligned are as for Fftw3.Sig.Genarray.dft.

parameter n
the logical length of the array. If not provided, it is automatically computed from ofsi, inci and Array1.dim x.
Remark: If you want to transform several 1D arrays at once, use Fftw3.Sig.Array2.dft with ~many:true.

val r2c : 
  ?meas:measure ->
  ?destroy_input:bool ->
  ?unaligned:bool ->
  ?howmany_n:int array ->
  ?howmanyi:int list ->
  ?ni:int ->
  ?ofsi:int ->
  ?inci:int ->
  'l float_array ->
  ?howmanyo:int list ->
  ?no:int ->
  ?ofso:int ->
  ?inco:int ->
  'l complex_array ->
  r2c plan

See Fftw3.Sig.Genarray.r2c.

val c2r : 
  ?meas:measure ->
  ?destroy_input:bool ->
  ?unaligned:bool ->
  ?howmany_n:int array ->
  ?howmanyi:int list ->
  ?ni:int ->
  ?ofsi:int ->
  ?inci:int ->
  'l complex_array ->
  ?howmanyo:int list ->
  ?no:int ->
  ?ofso:int ->
  ?inco:int ->
  'l float_array ->
  c2r plan

See Fftw3.Sig.Genarray.c2r.

val r2r : 
  r2r_kind ->
  ?meas:measure ->
  ?destroy_input:bool ->
  ?unaligned:bool ->
  ?howmany_n:int array ->
  ?howmanyi:int list ->
  ?ni:int ->
  ?ofsi:int ->
  ?inci:int ->
  'l float_array ->
  ?howmanyo:int list ->
  ?no:int ->
  ?ofso:int ->
  ?inco:int ->
  'l float_array ->
  r2r plan

See Fftw3.Sig.Genarray.r2r.

package fftw3