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torch.fft

Discrete Fourier transforms and related functions.

Fast Fourier Transforms

fft

Computes the one dimensional discrete Fourier transform of input.

ifft

Computes the one dimensional inverse discrete Fourier transform of input.

fft2

Computes the 2 dimensional discrete Fourier transform of input.

ifft2

Computes the 2 dimensional inverse discrete Fourier transform of input.

fftn

Computes the N dimensional discrete Fourier transform of input.

ifftn

Computes the N dimensional inverse discrete Fourier transform of input.

rfft

Computes the one dimensional Fourier transform of real-valued input.

irfft

Computes the inverse of rfft().

rfft2

Computes the 2-dimensional discrete Fourier transform of real input.

irfft2

Computes the inverse of rfft2().

rfftn

Computes the N-dimensional discrete Fourier transform of real input.

irfftn

Computes the inverse of rfftn().

hfft

Computes the one dimensional discrete Fourier transform of a Hermitian symmetric input signal.

ihfft

Computes the inverse of hfft().

hfft2

Computes the 2-dimensional discrete Fourier transform of a Hermitian symmetric input signal.

ihfft2

Computes the 2-dimensional inverse discrete Fourier transform of real input.

hfftn

Computes the n-dimensional discrete Fourier transform of a Herimitian symmetric input signal.

ihfftn

Computes the N-dimensional inverse discrete Fourier transform of real input.

Helper Functions

fftfreq

Computes the discrete Fourier Transform sample frequencies for a signal of size n.

rfftfreq

Computes the sample frequencies for rfft() with a signal of size n.

fftshift

Reorders n-dimensional FFT data, as provided by fftn(), to have negative frequency terms first.

ifftshift

Inverse of fftshift().

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