How to draw spectrum of signal?

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Adnan
Adnan il 12 Nov 2024 alle 15:22
Risposto: Image Analyst il 12 Nov 2024 alle 15:37
Hello. I have problem with understanding how to draw spectrum of this shape in matlab because amplitude is constant when frequency is lower than 1500 and then it change from 1500 to 3000Hz. Thank you.

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Image Analyst
Image Analyst il 12 Nov 2024 alle 15:37
Did you try plot()?
fm = 1000; % whatever
f = [0, 0, fm/2, fm];
X2 = [0, 1, 1, 0];
plot(f, X2, 'r-', 'LineWidth', 4);
xlabel('f [Hz]');
ylabel('X2(f)');
grid on;

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