fg_02_01.m

来自「英文书《Digital Signal Processing with Examp」· M 代码 · 共 18 行

% fg_02_01  Continuous least squares.
N=1000;
k=[0:N-1];
x=40*sin(2*pi*k/500)/(pi^2);
s=5*[0:124,125:-1:-124,-125:124,125:-1:-124,-125:-1]/125;
%
figure(1); clf;
set(gcf,'position',[80,40,700,450]);
set(gcf,'paperPositionmode','auto');
axis([0 1000 -5 5]);
set(gca,'fontname','times','fontsize',18);
set(gca,'position',[.13 .15 .9-.13 .9-.15]);
%
line(k,x,'color','k');
line(k,s,'color','k'); grid on;
xlabel('Time (t)');
ylabel('f(t) and l.s. sine approximation');