transform.py 文件源码

def w_k(self):
        """Angular frequency as a function of Fourier index.

        See eq5 of TC.

        N.B the frequencies returned by numpy are adimensional, on
        the interval [-1/2, 1/2], so we multiply by 2 * pi.
        """
        return 2 * np.pi * np.fft.fftfreq(self.N, self.dt)