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Computes a real 1- or 2-D Fast Fourier transform.
rfft
x (NxK real matrix) – data
y (LxM matrix) – where \(L\) and \(M\) are the smallest powers of 2 greater than or equal to \(N\) and \(K\), respectively.
Computes the RFFT of x, scaled by \(\frac{1}{(L*M)}\).
This uses a Temperton Fast Fourier algorithm.
If \(N\) or \(K\) is not a power of 2, x will be padded out with zeros before computing the transform.
See also
Functions rffti(), fft(), ffti(), fftm(), fftmi()
rffti()
fft()
ffti()
fftm()
fftmi()
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