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MATLAB: Generation of discrete time signals


    MATLAB programs to generate and plot the following discrete time sequences: (a)
    unit sample sequence del(n), (b) unit step sequence u(n), (c) ramp sequence r(n), (d) real-valued
    exponential sequence x(n) = (0.8)^n u(n) for 0 < n < 50.
   

n=-10:10;
deltan=1.*(n==0);
subplot(411);
stem(n,deltan,".");
xlabel("n"); ylabel("delta");
title("delta func");

%unit stepfunction
step=1.*(n>=0);
subplot(412);
stem(n,step,".");
xlabel("n"); ylabel("u(n)");
title("unit step func");

%unit ramp
ramp=n.*(n>=0);
subplot(413);
stem(n,ramp,".");
xlabel("n"); ylabel("r(n)");
title("unit ramp func");

%exponential signal
n=0:50;
xn=0.8.^n;
subplot(414);
stem(n,xn,".");
xlabel("n"); ylabel("x(n)");
title("unit exp func");

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