自己编写的一个高效的快速傅里叶变换(FFT)程序，可以对一个一维信号进行变换，同时可以进行修改，摆脱了对于MATLAB中fft命令的依赖。-I have written a highly efficient fast Fourier transform (FFT) program, you can transform a one-dimensional signal, and can be modified to get rid of dependence for the MATLAB fft command.