课程设计时编写的matlab程序代码，包括最小二乘法、SVM、神经网络、1_k近邻法,分析了该信号的时域、频域、倒谱，循环谱等。- Course designed to prepare the matlab program code, Including the least squares method, the SVM, neural networks, 1 _k neighbor method, Analysis of the signal time domain, frequency do