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().

See also

Functions rfft(), fft(), ffti(), fftm(), fftmi()