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Plot the magnitude plot of Discrete Time Fourier Transform | MATLAB


%Code:-
clc
clear all
close all
n=-20:20;
xn=cos(2*pi*0.2*n);
w=-pi:0.01:pi;
for i=1:length(w)
    xw(i)=sum(xn.*exp(-1i*w(i)*n));
end
plot(w,abs(xw));


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MATLAB