diff options
Diffstat (limited to 'numpy/fft/fftpack.py')
| -rw-r--r-- | numpy/fft/fftpack.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/numpy/fft/fftpack.py b/numpy/fft/fftpack.py index e0e96cc79..de675936f 100644 --- a/numpy/fft/fftpack.py +++ b/numpy/fft/fftpack.py @@ -35,9 +35,12 @@ from __future__ import division, absolute_import, print_function __all__ = ['fft', 'ifft', 'rfft', 'irfft', 'hfft', 'ihfft', 'rfftn', 'irfftn', 'rfft2', 'irfft2', 'fft2', 'ifft2', 'fftn', 'ifftn'] +import functools + from numpy.core import (array, asarray, zeros, swapaxes, shape, conjugate, take, sqrt) from numpy.core.multiarray import normalize_axis_index +from numpy.core import overrides from . import fftpack_lite as fftpack from .helper import _FFTCache @@ -45,6 +48,10 @@ _fft_cache = _FFTCache(max_size_in_mb=100, max_item_count=32) _real_fft_cache = _FFTCache(max_size_in_mb=100, max_item_count=32) +array_function_dispatch = functools.partial( + overrides.array_function_dispatch, module='numpy.fft') + + def _raw_fft(a, n=None, axis=-1, init_function=fftpack.cffti, work_function=fftpack.cfftf, fft_cache=_fft_cache): a = asarray(a) @@ -101,6 +108,11 @@ def _unitary(norm): return norm is not None +def _fft_dispatcher(a, n=None, axis=None, norm=None): + return (a,) + + +@array_function_dispatch(_fft_dispatcher) def fft(a, n=None, axis=-1, norm=None): """ Compute the one-dimensional discrete Fourier Transform. @@ -197,6 +209,7 @@ def fft(a, n=None, axis=-1, norm=None): return output +@array_function_dispatch(_fft_dispatcher) def ifft(a, n=None, axis=-1, norm=None): """ Compute the one-dimensional inverse discrete Fourier Transform. @@ -290,6 +303,8 @@ def ifft(a, n=None, axis=-1, norm=None): return output * (1 / (sqrt(n) if unitary else n)) + +@array_function_dispatch(_fft_dispatcher) def rfft(a, n=None, axis=-1, norm=None): """ Compute the one-dimensional discrete Fourier Transform for real input. @@ -379,6 +394,7 @@ def rfft(a, n=None, axis=-1, norm=None): return output +@array_function_dispatch(_fft_dispatcher) def irfft(a, n=None, axis=-1, norm=None): """ Compute the inverse of the n-point DFT for real input. @@ -469,6 +485,7 @@ def irfft(a, n=None, axis=-1, norm=None): return output * (1 / (sqrt(n) if unitary else n)) +@array_function_dispatch(_fft_dispatcher) def hfft(a, n=None, axis=-1, norm=None): """ Compute the FFT of a signal that has Hermitian symmetry, i.e., a real @@ -551,6 +568,7 @@ def hfft(a, n=None, axis=-1, norm=None): return irfft(conjugate(a), n, axis) * (sqrt(n) if unitary else n) +@array_function_dispatch(_fft_dispatcher) def ihfft(a, n=None, axis=-1, norm=None): """ Compute the inverse FFT of a signal that has Hermitian symmetry. @@ -641,6 +659,11 @@ def _raw_fftnd(a, s=None, axes=None, function=fft, norm=None): return a +def _fftn_dispatcher(a, s=None, axes=None, norm=None): + return (a,) + + +@array_function_dispatch(_fftn_dispatcher) def fftn(a, s=None, axes=None, norm=None): """ Compute the N-dimensional discrete Fourier Transform. @@ -738,6 +761,7 @@ def fftn(a, s=None, axes=None, norm=None): return _raw_fftnd(a, s, axes, fft, norm) +@array_function_dispatch(_fftn_dispatcher) def ifftn(a, s=None, axes=None, norm=None): """ Compute the N-dimensional inverse discrete Fourier Transform. @@ -835,6 +859,7 @@ def ifftn(a, s=None, axes=None, norm=None): return _raw_fftnd(a, s, axes, ifft, norm) +@array_function_dispatch(_fftn_dispatcher) def fft2(a, s=None, axes=(-2, -1), norm=None): """ Compute the 2-dimensional discrete Fourier Transform @@ -925,6 +950,7 @@ def fft2(a, s=None, axes=(-2, -1), norm=None): return _raw_fftnd(a, s, axes, fft, norm) +@array_function_dispatch(_fftn_dispatcher) def ifft2(a, s=None, axes=(-2, -1), norm=None): """ Compute the 2-dimensional inverse discrete Fourier Transform. @@ -1012,6 +1038,7 @@ def ifft2(a, s=None, axes=(-2, -1), norm=None): return _raw_fftnd(a, s, axes, ifft, norm) +@array_function_dispatch(_fftn_dispatcher) def rfftn(a, s=None, axes=None, norm=None): """ Compute the N-dimensional discrete Fourier Transform for real input. @@ -1104,6 +1131,7 @@ def rfftn(a, s=None, axes=None, norm=None): return a +@array_function_dispatch(_fftn_dispatcher) def rfft2(a, s=None, axes=(-2, -1), norm=None): """ Compute the 2-dimensional FFT of a real array. @@ -1141,6 +1169,7 @@ def rfft2(a, s=None, axes=(-2, -1), norm=None): return rfftn(a, s, axes, norm) +@array_function_dispatch(_fftn_dispatcher) def irfftn(a, s=None, axes=None, norm=None): """ Compute the inverse of the N-dimensional FFT of real input. @@ -1235,6 +1264,7 @@ def irfftn(a, s=None, axes=None, norm=None): return a +@array_function_dispatch(_fftn_dispatcher) def irfft2(a, s=None, axes=(-2, -1), norm=None): """ Compute the 2-dimensional inverse FFT of a real array. |