mlx.core.fft.fftfreq# fftfreq(n: int, d: float = 1.0, stream: Stream | mlx.core.ThreadLocalStream | Device | None = None) → array# Return the discrete Fourier Transform sample frequencies. 参数: n (int) -- Window length. d (float, optional) -- Sample spacing. The default is 1.0. 返回: The sample frequencies as a one-dimensional array of type float32. 返回类型: array