rfft¶
Purpose¶
Computes a real 1- or 2-D Fast Fourier transform.
Format¶
-
y =
rfft(x)¶ - Parameters:
x (NxK real matrix) – data
- Returns:
y (LxM matrix) – where \(L\) and \(M\) are the smallest powers of 2 greater than or equal to \(N\) and \(K\), respectively.
Remarks¶
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.