bundles / scipy latest / scipy / fft / _helper / ifftshift

function

`scipy.fft._helper:ifftshift`

source: build-install/usr/lib/python3.14/site-packages/scipy/fft/_helper.py:307

Signature

def ifftshift(x, axes = None)

Summary

The inverse of fftshift. Although identical for even-length x, the functions differ by one sample for odd-length x.

Parameters

x : array_like: Input array.
axes : int or shape tuple, optional: Axes over which to calculate. Defaults to None, which shifts all axes.

Returns

y : ndarray: The shifted array.

Examples

import numpy as np
freqs = np.fft.fftfreq(9, d=1./9).reshape(3, 3)
freqs
np.fft.ifftshift(np.fft.fftshift(freqs))

✓

array([[ 0.,  1.,  2.],
       [ 3.,  4., -4.],
       [-3., -2., -1.]])

See also

fftshift: Shift zero-frequency component to the center of the spectrum.

Aliases

scipy.fft.ifftshift