xrscipy.fftpack.idst

xrscipy.fftpack.idst(x, coord, type=2, n=None, norm=None)

idst(x, coord, type=2, n=None, norm=None)

Parameters:

  • obj (xarray object) – The input array.

  • coord (string) – Coordinate along which the idst is computed. The coordinate must be evenly spaced.

  • type ({1, 2, 3, 4}, 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].

  • norm ({None, 'ortho'}, optional) – Normalization mode (see Notes). Default is None.

Returns:

idst – The transformed input array.

Return type:

ndarray of real

See also

dst

Forward DST

numpy.fftpack.idst

scipy.fft.idst : Original scipy implementation

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.