fg_10_08.m

英文书《Digital Signal Processing with Examples in MATLAB》附带的MATLAB实例

% fg_10_08    Waveform vector for Huffman coding.
x=[4 4 4 5, 4 3 2 1, 0 1 2 3, 2 3 2 3, ...
    4 5 6 5, 4 5 6 7, 6 5 4 5, 6 5 5 4];
sp_fig(1,8.5,4);
set(gca,'position',[.1,.2,.5,.5]);
set(gca,'fontsize',16);
plot([0:31],x,'-*r'); grid on;
axis([0 32 0 7]);
xlabel('Sample (k)'); ylabel('x_k');
set(gca,'xtick',[0:31]);
set(gca,'xticklabel','0|||||5|||||10|||||15|||||20|||||25|||||30||');
set(gca,'ytick',[0:7]);
title('Signal');

msg='symbol   frequency ';
text(36,7,msg,'fontsize',16)
f=freq(x);
for i=1:8
	msg=['   ',int2str(i-1),'        ',num2str(f(i))];
	text(38,6.7-.8*i,msg,'fontname','times','fontsize',16);
end
text(36,-1,['H=',num2str(entropy(x)),' bits/s'],'fontsize',16);