作业帮matlab中freqz这么用对不对N=64;x=[1 zeros(1,N-1)]; %产生单位冲激函数num=[0.008 -0.033 0.05 -0.033 0.008];den=[1 2.37 2.7 1.6 0.41];y=filter(num,den,x); %计算单位冲激响应figure(1);n=1:N;stem(n,y,'fill');grid on; title('单位冲
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![matlab中freqz这么用对不对N=64;x=[1 zeros(1,N-1)]; %产生单位冲激函数num=[0.008 -0.033 0.05 -0.033 0.008];den=[1 2.37 2.7 1.6 0.41];y=filter(num,den,x); %计算单位冲激响应figure(1);n=1:N;stem(n,y,'fill');grid on; title('单位冲](/uploads/image/z/8324386-34-6.jpg?t=matlab%E4%B8%ADfreqz%E8%BF%99%E4%B9%88%E7%94%A8%E5%AF%B9%E4%B8%8D%E5%AF%B9N%3D64%3Bx%3D%5B1+zeros%281%2CN-1%29%5D%3B+%25%E4%BA%A7%E7%94%9F%E5%8D%95%E4%BD%8D%E5%86%B2%E6%BF%80%E5%87%BD%E6%95%B0num%3D%5B0.008+-0.033+0.05+-0.033+0.008%5D%3Bden%3D%5B1+2.37+2.7+1.6+0.41%5D%3By%3Dfilter%28num%2Cden%2Cx%29%3B+%25%E8%AE%A1%E7%AE%97%E5%8D%95%E4%BD%8D%E5%86%B2%E6%BF%80%E5%93%8D%E5%BA%94figure%281%29%3Bn%3D1%3AN%3Bstem%28n%2Cy%2C%27fill%27%29%3Bgrid+on%3B+title%28%27%E5%8D%95%E4%BD%8D%E5%86%B2)
matlab中freqz这么用对不对N=64;x=[1 zeros(1,N-1)]; %产生单位冲激函数num=[0.008 -0.033 0.05 -0.033 0.008];den=[1 2.37 2.7 1.6 0.41];y=filter(num,den,x); %计算单位冲激响应figure(1);n=1:N;stem(n,y,'fill');grid on; title('单位冲
matlab中freqz这么用对不对
N=64;
x=[1 zeros(1,N-1)]; %产生单位冲激函数
num=[0.008 -0.033 0.05 -0.033 0.008];
den=[1 2.37 2.7 1.6 0.41];
y=filter(num,den,x); %计算单位冲激响应
figure(1);
n=1:N;
stem(n,y,'fill');grid on; title('单位冲激响应');
figure(2)
Fs=1024;
freqz(num,den,N,Fs);grid on; %做出幅频和相频响应曲线
为什么第二张图显示不出来,总是报错：
No appropriate methods for function freqz
matlab中freqz这么用对不对N=64;x=[1 zeros(1,N-1)]; %产生单位冲激函数num=[0.008 -0.033 0.05 -0.033 0.008];den=[1 2.37 2.7 1.6 0.41];y=filter(num,den,x); %计算单位冲激响应figure(1);n=1:N;stem(n,y,'fill');grid on; title('单位冲
我将您的程序复制粘贴到matlab7.10.0中,可以运行,第二张图也可以显示出来.freqz有几种不同的调用格式.您的调用方法,其为复频率响应,同时出现幅频和相频.
