ifftshift — SciPy v1.15.3 Manual (original) (raw)

scipy.fft.

scipy.fft.ifftshift(x, axes=None)[source]#

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

Parameters:

xarray_like

Input array.

axesint or shape tuple, optional

Axes over which to calculate. Defaults to None, which shifts all axes.

Returns:

yndarray

The shifted array.

See also

fftshift

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

Examples

import numpy as np freqs = np.fft.fftfreq(9, d=1./9).reshape(3, 3) freqs array([[ 0., 1., 2.], [ 3., 4., -4.], [-3., -2., -1.]]) np.fft.ifftshift(np.fft.fftshift(freqs)) array([[ 0., 1., 2.], [ 3., 4., -4.], [-3., -2., -1.]])