irfftn(a: array, s: Optional[Sequence[int]] = None, axes: Optional[Sequence[int]] = None, stream: Optional[Union[Stream, Device]] = None) array#

The inverse of rfftn().

Note the input is generally complex. The dimensions of the input specified in axes are padded or truncated to match the sizes from s. The last axis in axes is treated as the real axis and will have size s[-1] // 2 + 1.

  • a (array) – The input array.

  • s (list(int), optional) – Sizes of the transformed axes. The corresponding axes in the input are truncated or padded with zeros to match the sizes in s. The default value is the sizes of a along axes.

  • axes (list(int), optional) – Axes along which to perform the FFT. The default is None in which case the FFT is over the last len(s) axes or all axes if s is also None.


The real array containing the inverse of rfftn().

Return type: