scipy.fftpack.ifftn¶
-
scipy.fftpack.
ifftn
(x, shape=None, axes=None, overwrite_x=False)[source]¶ Return inverse multi-dimensional discrete Fourier transform.
The sequence can be of an arbitrary type.
The returned array contains:
y[j_1,..,j_d] = 1/p * sum[k_1=0..n_1-1, ..., k_d=0..n_d-1] x[k_1,..,k_d] * prod[i=1..d] exp(sqrt(-1)*2*pi/n_i * j_i * k_i)
where
d = len(x.shape)
,n = x.shape
, andp = prod[i=1..d] n_i
.For description of parameters see
fftn
.See also
fftn
for detailed information.
Examples
>>> from scipy.fftpack import fftn, ifftn >>> import numpy as np >>> y = (-np.arange(16), 8 - np.arange(16), np.arange(16)) >>> np.allclose(y, ifftn(fftn(y))) True