matlab ,已有数据,如何滤波?答:[N,Wn]=buttord(Omip,Omis,Rp,Rs); %确定滤波器的阶数 disp(['The order of Butterworth Filtering is ',num2str(N)]);[b,a]=butter(N,Wn); %确定Butterworth滤波器转移函数系数向量 [H,w]=freqz(b,a,512); %512点复频响应 subplot(221); %绘制幅频响应曲线 plot(w/pi...
基于matlab数字滤波器的设计答:[z, p, k] = buttap(N); % 由极零点获得转移函数参数 [b, a] = zp2tf(z, p, k); % 由原型滤波器获得实际低通滤波器 [B, A] = lp2lp(b, a, wp);[bz, az] = bilinear(B, A, .5);[h, w] = freqz(bz, az, 256, Fs);figure plot(w, abs(h))grid on ...