%-----------------------------------------------------------------
% exa011004_sinc.m, for example 1.10.4
%                   to generate the sinc function.
% 產(chǎn)生一 sinc 函數(shù)；
%-----------------------------------------------------------------
clear;

n=200;
stept=4*pi/n;
t=-2*pi:stept:2*pi;
y=sinc(t);
plot(t,y,t,zeros(size(t)));
ylabel('sinc(t)');
xlabel('t=-2*pi~2*pi');
grid on;