% Name: sampling.m
%
clear,close all,
t=-1:0.01:1;
n=-10:10;
x1=sin(pi*t)+sin(2*pi*t);
x2=sin(pi*n*0.1)+sin(2*pi*n*0.1);

subplot(221)
plot(t,x1)
%axis([0,2000,0,1.2])
grid on,title('The signal x(t)')
xlabel('Time t')

subplot(222)
stem(n,x2,'r.')
%axis([-5,5,0,1.2])
grid on,title('The sampled version of the signal x(t)')
xlabel('Time index n')