fg_02_05.m

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

% fg_02_05         Chapter 2, fig. 2.5, both plots.
%
sp_fig(1)
set(gca,'fontname','times','fontsize',16);
set(gca,'position',[.1 .15 .2 .7]);
% Left
N=50;
n=[0:N-1];
F=[zeros(1,28),ones(1,12),zeros(1,10)];
hl=line(n,F,'linestyle','-','Marker','.','color','k');
grid;
xlabel('Sample number (n)');
ylabel('Sample value (x_n)');
title('Elements of sample vector')
% Right
axes('position',[.45 .15 .5 .7]);
set(gca,'fontname','times','fontsize',16);
N=50;
n=[-29:100];
F1=[zeros(1,28),ones(1,12),zeros(1,10)];
F=[F1(21:50),F1,F1];
line(n,F,'linestyle','-','marker','.','color','k'); grid;
axis([-30 100 0 1]);
xlabel('Sample number (n)');
ylabel('Sample value (x_n)');
title('Periodic extension')