designbutworth.m

从 Win32 控制台程序调用MATLAB C Math Library,从VC++中调用m函数,有几十个例子

function  designbutworth
%designbutworth.m
%used to design 16-order Butterworth filter,which has a 1.5KHz-5KHz passband with 
%a sampling rate 16KHz.
Fs=16;
[b,a]=butter(8,[1.5/(Fs/2)  5/(Fs/2)],'bandpass')
freqz(b,a,512,16000)