【MATLAB】freqz2()使用方法官方文档翻译

freqz2 二维频率响应 语句 [H,f1,f2] = freqz2(h) [H,f1,f2] = freqz2(h,[n1 n2]) [H,f1,f2] = freqz2(h,f1, f2) [___] = freqz2(h,___,[dx dy]) freqz2(___)   说明 [H,f1,f2] = freqz2(h) 的返回值 H是h的64*64频率响应，f1和f2是长度为64的频率

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