numpy.fft.ifftshift¶
-
numpy.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: 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.
See also
fftshift
- Shift zero-frequency component to the center of the spectrum.
Examples
>>> 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.]])