fg_10_06.m

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

% fg_10_06    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,.3,.5]);
set(gca,'fontsize',16);
line([0:31],x,'marker','*','color','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=['x=[',int2str(x(1:16))];
text(33,7,msg,'fontsize',16)
msg=[int2str(x(17:32)),']'];
text(36.5,6.,msg,'fontsize',16)
msg=['symbols: ',int2str([0:7])];
text(33,4,msg,'fontsize',16)
msg=['  32*f_x=[',int2str(32*freq(x)),']'];
text(34.9,2.7,msg,'fontsize',16)
msg=['Entropy of x: H_x=',num2str(entropy(x)),' bits/sample'];
text(33,1,msg,'fontsize',16)