rffti#
Purpose#
Computes inverse real 1- or 2-D Fast Fourier transform.
Format#
- y = rffti(x)#
- Parameters:
x (NxK matrix) – data
- Returns:
y (LxM real matrix) – where \(L\) and \(M\) are the smallest prime factor products greater than or equal to \(N\) and \(K\).
Remarks#
It is up to the user to guarantee that the input will return a real result. If in doubt, use ffti().