spectrum_analyzer.py 文件源码

def frequencies(self):
        """
        :return: frequency array
        """
        if self.baseband:
            return np.fft.rfftfreq(self.data_length*self.PADDING_FACTOR,
                                   self.sampling_time)
        else:
            return self.center + scipy.fftpack.fftshift( scipy.fftpack.fftfreq(
                                  self.data_length*self.PADDING_FACTOR,
                                  self.sampling_time)) #[self.useful_index()]