# tensorplay.fft.fftfreq

Source: https://www.tensorplay.cn/docs/generated/tensorplay.fft.fftfreq.html

# tensorplay.fft.fftfreq

tensorplay.fft.fftfreq(n, d=1.0, *, dtype=<DType.float32: 8>, device=None)[[source]](../_modules/tensorplay/fft.html#fftfreq)

DFT sample frequencies (cycles/unit): [0, 1, ..., n/2-1, -n/2, ..., -1] / (n*d).

Parameters:

- n ([int](https://docs.python.org/3/library/functions.html#int)) – window length

- d ([float](https://docs.python.org/3/library/functions.html#float) , optional ) – sample spacing. Default: 1.0

- device ( dtype / ) – forwarded to the factory ops. Default: float32/CPU