Discrete Fourier transforms (scipy.fft)

Fast Fourier Transforms (FFTs)

fft	Compute the 1-D discrete Fourier Transform.
ifft	Compute the 1-D inverse discrete Fourier Transform.
fft2	Compute the 2-D discrete Fourier Transform
ifft2	Compute the 2-D inverse discrete Fourier Transform.
fftn	Compute the N-D discrete Fourier Transform.
ifftn	Compute the N-D inverse discrete Fourier Transform.
rfft	Compute the 1-D discrete Fourier Transform for real input.
irfft	Compute the inverse of the n-point DFT for real input.
rfft2	Compute the 2-D FFT of a real array.
irfft2	Compute the 2-D inverse FFT of a real array.
rfftn	Compute the N-D discrete Fourier Transform for real input.
irfftn	Compute the inverse of the N-D FFT of real input.
hfft	Compute the FFT of a signal that has Hermitian symmetry, i.e., a real spectrum.
ihfft	Compute the inverse FFT of a signal that has Hermitian symmetry.
hfft2	Compute the 2-D FFT of a Hermitian complex array.
ihfft2	Compute the 2-D inverse FFT of a real spectrum.
hfftn	Compute the N-D FFT of Hermitian symmetric complex input, i.e., a signal with a real spectrum.
ihfftn	Compute the N-D inverse discrete Fourier Transform for a real spectrum.

Discrete Sin and Cosine Transforms (DST and DCT)

dct	Return the Discrete Cosine Transform of arbitrary type sequence x.
idct	Return the Inverse Discrete Cosine Transform of an arbitrary type sequence.
dctn	Return multidimensional Discrete Cosine Transform along the specified axes.
idctn	Return multidimensional Discrete Cosine Transform along the specified axes.
dst	Return the Discrete Sine Transform of arbitrary type sequence x.
idst	Return the Inverse Discrete Sine Transform of an arbitrary type sequence.
dstn	Return multidimensional Discrete Sine Transform along the specified axes.
idstn	Return multidimensional Discrete Sine Transform along the specified axes.

Helper functions

fftshift(x[, axes])	Shift the zero-frequency component to the center of the spectrum.
ifftshift(x[, axes])	The inverse of fftshift.
fftfreq(n[, d])	Return the Discrete Fourier Transform sample frequencies.
rfftfreq(n[, d])	Return the Discrete Fourier Transform sample frequencies (for usage with rfft, irfft).
next_fast_len	Find the next fast size of input data to fft, for zero-padding, etc.
set_workers(workers)	Context manager for the default number of workers used in scipy.fft
get_workers()	Returns the default number of workers within the current context

Backend control

set_backend(backend[, coerce, only])	Context manager to set the backend within a fixed scope.
skip_backend(backend)	Context manager to skip a backend within a fixed scope.
set_global_backend(backend)	Sets the global fft backend
register_backend(backend)	Register a backend for permanent use.