sfreq.m

里面囊括了基于matlab滤波器设计的各种.m文件

 %f = sfreq(h,omega)
%Computation of the frequency response of filter h
%at the point omega by using the simple method
%but the order of h must be odd
%See also SFREQ1

function f=sfreq(h,omega)
N = size(h,2);
for I = 1:N/2
 c(I) = cos(((I-1)+0.5)*omega);
end
f = abs(2*h(N/2+1:N)*c');