matlab例程，初学者的福音，要的赶快下压，绝对好东西-matlab routines for beginners of the Gospel, to the quickly under pressure, never a good thing

function [A,w,type,tao]=amplres(h) 《数字信号处理教程——MATLAB释义与实现》子程序 给定FIR滤波器系数求滤波器符幅特性-function [A, w, type, tao] = amplres (h) " digital signal processing tutorial- MATLAB Interpretation and Implementation" procedure FIR filter coefficien