% Chapter 7 Example 7.28%           Hilbert transformer design using PM algorithm%f = [0.05,0.95]; m = [1 1]; M = 51; N = M-1;h = remez(N,f,m,'hilbert');[db,mag,pha,grd,w] = freqz_m(h,[1]);figure(1); subplot(1,1,1)subplot(2,1,1); stem([0:N],h); title('Impulse Response');xlabel('n'); ylabel('h(n)'); axis([0,N,-0.8,0.8])set(gca,'XTickMode','manual','XTick',[0,N])set(gca,'YTickMode','manual','YTick',[-0.8:0.2:0.8]);subplot(2,1,2); plot(w/pi,mag); title('Magnitude Response')xlabel('frequency in pi units'); ylabel('|H|')set(gca,'XTickMode','manual','XTick',[0,f,1])set(gca,'YTickMode','manual','YTick',[0,1]);grid