scipy.fftpack.idst¶

scipy.fftpack.
idst
(x, type=2, n=None, axis=1, norm=None, overwrite_x=False)[source]¶ Return the Inverse Discrete Sine Transform of an arbitrary type sequence.
Parameters: x : array_like
The input array.
type : {1, 2, 3}, optional
Type of the DST (see Notes). Default type is 2.
n : int, optional
Length of the transform. If
n < x.shape[axis]
, x is truncated. Ifn > x.shape[axis]
, x is zeropadded. The default results inn = x.shape[axis]
.axis : int, optional
Axis along which the idst is computed; the default is over the last axis (i.e.,
axis=1
).norm : {None, ‘ortho’}, optional
Normalization mode (see Notes). Default is None.
overwrite_x : bool, optional
If True, the contents of x can be destroyed; the default is False.
Returns: idst : ndarray of real
The transformed input array.
See also
dst
 Forward DST
Notes
‘The’ IDST is the IDST of type 2, which is the same as DST of type 3.
IDST of type 1 is the DST of type 1, IDST of type 2 is the DST of type 3, and IDST of type 3 is the DST of type 2. For the definition of these types, see
dst
.New in version 0.11.0.