Owl_fft_generic (p.owl.0.5.0.doc.owl.Owl_fft

Basic functions

val fft : 
  ?axis:int ->
  (Complex.t, 'a) Owl_dense_ndarray_generic.t ->
  (Complex.t, 'a) Owl_dense_ndarray_generic.t

``fft ~axis x`` performs 1-dimensional FFT on a complex input. ``axis`` is the highest dimension if not specified. The return is not scaled.

Source

val ifft : 
  ?axis:int ->
  (Complex.t, 'a) Owl_dense_ndarray_generic.t ->
  (Complex.t, 'a) Owl_dense_ndarray_generic.t

``ifft ~axis x`` performs inverse 1-dimensional FFT on a complex input. ``axis`` is the highest dimension by default.

Source

val rfft : 
  ?axis:int ->
  otyp:(Complex.t, 'a) Owl_dense_ndarray_generic.kind ->
  (float, 'b) Owl_dense_ndarray_generic.t ->
  (Complex.t, 'a) Owl_dense_ndarray_generic.t

``rfft ~axis ~otyp x`` performs 1-dimensional FFT on real input along the ``axis``. ``otyp`` is used to specify the output type, it must be the consistent precision with input ``x``. You can skip this parameter by using a submodule with specific precision such as ``Owl.Fft.S`` or ``Owl.Fft.D``.

Source

val irfft : 
  ?axis:int ->
  ?n:int ->
  otyp:(float, 'a) Owl_dense_ndarray_generic.kind ->
  (Complex.t, 'b) Owl_dense_ndarray_generic.t ->
  (float, 'a) Owl_dense_ndarray_generic.t

``irfft ~axis ~n x`` is the inverse function of ``rfft``. Note the ``n`` parameter is used to specified the size of output.