Question

"freqz_m"在matlab中怎样定义

Answer 1

function [db,mag,pha,grd,w] = freqz_m(b,a);
[H,w] = freqz(b,a,1000,'whole');
H = (H(1:1:501))'; w = (w(1:1:501))';
mag = abs(H);
db = 20*log10((mag+eps)/max(mag));
pha = angle(H);
grd = grpdelay(b,a,w);