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. If n > x.shape[axis], x is zero-padded. The default results in n = 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.