dpnp.fft.ifftshift

dpnp.fft.ifftshift(x, axes=None)[source]

Inverse shift the zero-frequency component to the center of the spectrum.

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

For full documentation refer to numpy.fft.ifftshift.

Parameters:

x ({dpnp.ndarray, usm_ndarray}) -- Input array.
axes ({None, int, list or tuple of ints}, optional) -- Axes over which to calculate. Defaults to None, which shifts all axes.

Returns:

out -- The shifted array.

Return type:

dpnp.ndarray

See also

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

Examples

>>> import dpnp 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.]])