how i using three di↵erent window lengths (i.e., 1 second, 20 seconds, 100 seconds). Plot, and comment on the results. What happens as you increase the window length?

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% Sinusoidal signal with two frequencies
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f1 = 0.5; % 1 Hz component
f2 = 2.5; % 2.5 Hz component
fs = 5*f2; % Sampling Frequency
T = 1/fs; % Sampling Period
n = 0:30*fs; % Plot 30 seconds
k = n*T; % Time Index
xs = 3*sin(2*pi*f1.*k) + 2*sin(2*pi*f2.*k);
subplot(3,2,1);
h = plot(k,xs); set(h, 'Markersize', 15);
ylabel('x(nT)'); box off;
axis tight;

Answer 1

[Abhishek Ballaney]

https://en.wikipedia.org/wiki/Window_function