scipy.fftpack.rfftfreq¶
- scipy.fftpack.rfftfreq(n, d=1.0)[source]¶
DFT sample frequencies (for usage with rfft, irfft).
The returned float array contains the frequency bins in cycles/unit (with zero at the start) given a window length n and a sample spacing d:
f = [0,1,1,2,2,...,n/2-1,n/2-1,n/2]/(d*n) if n is even f = [0,1,1,2,2,...,n/2-1,n/2-1,n/2,n/2]/(d*n) if n is odd
