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latest (dev)2026-10-15
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Latest development documentation · Updated 2026-10-15

tensorplay.fft

Discrete Fourier transforms and related functions.

Fast Fourier Transforms

tensorplay.fft._transforms.fft

Computes the one-dimensional discrete Fourier transform.

tensorplay.fft._transforms.ifft

Computes the one-dimensional inverse discrete Fourier transform.

tensorplay.fft._transforms.fft2

Computes the two-dimensional discrete Fourier transform.

tensorplay.fft._transforms.ifft2

Computes the two-dimensional inverse discrete Fourier transform.

tensorplay.fft._transforms.fftn

Computes the N-dimensional discrete Fourier transform over dim.

tensorplay.fft._transforms.ifftn

Computes the N-dimensional inverse discrete Fourier transform.

tensorplay.fft._transforms.rfft

Computes the one-dimensional FFT of real input, one-sided output.

tensorplay.fft._transforms.irfft

Computes the inverse of rfft(); n is the output length.

tensorplay.fft._transforms.rfft2

Computes the two-dimensional FFT of real input.

tensorplay.fft._transforms.irfft2

Computes the inverse of rfft2().

tensorplay.fft._transforms.rfftn

N-dimensional FFT of real input; one-sided along the last listed dim.

tensorplay.fft._transforms.irfftn

Inverse of rfftn(); s[-1] is the real output size (default 2 * (input.size(dim[-1]) - 1)).

tensorplay.fft._transforms.hfft

Computes the 1-D FFT of a Hermitian-symmetric spectrum; real output.

tensorplay.fft._transforms.ihfft

Computes the inverse of hfft(); one-sided complex output.

tensorplay.fft._transforms.hfft2

Two-dimensional FFT of a Hermitian-symmetric spectrum; real output.

tensorplay.fft._transforms.ihfft2

Two-dimensional counterpart of ihfft().

tensorplay.fft._transforms.hfftn

N-dimensional FFT of a Hermitian-symmetric spectrum; real output.

tensorplay.fft._transforms.ihfftn

Inverse of hfftn(): ihfft() along the final transformed dimension, then the inverse transform over the remaining dimensions.

Helper Functions

tensorplay.fft._frequency.fftfreq

DFT sample frequencies (cycles/unit): [0, 1, ..., (n-1)//2, -(n//2), ..., -1] / (n*d).

tensorplay.fft._frequency.rfftfreq

Sample frequencies for rfft()/one-sided transforms: [0..n//2] / (n*d).

tensorplay.fft._frequency.fftshift

Re-orders an N-D FFT output so the zero-frequency term is centered.

tensorplay.fft._frequency.ifftshift

Inverse of fftshift(); rolls by (n + 1) // 2 (odd-safe).

tensorplay.export

tensorplay.export.AdditionalInputs

tensorplay.func

tensorplay.func is a library of composable function transforms.

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Fast Fourier TransformsHelper Functions
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