实现非均匀采样信号的离散傅里叶变换.对信号进行非均匀采样后进行非均匀离散傅里叶变换。用多个信号对该程序进行了测试。-given a signal, sample it non-uniformly and then compute the Fourier spectrum of non-uniformly sampled signals using Non-uniform Discrete Fourier Transform(NUDFT）.The programm is tested using