快速傅立叶变换（FFT）算法实现 将DFT算法与FFT算法计算时间进行比较，分析二者的效率和精确差异。-Fast Fourier Transform (FFT) algorithm to DFT algorithm and FFT algorithm for computing time to carry out comparative analysis between the two differences in the efficiency and precision.

DFT变换VC实现，对学习傅里叶变换的人很有帮助-DFT-VC implementation of the Fourier transform of people to learn useful