how can i get my code to produce FFT graph.

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morris konadu 2019-7-29

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回答： Vimal Rathod 2019-8-1

This is my code below but doesnt work

L = length(signal);

Y = fft(signal);

Y1 = abs(Y);

% onlys show one sided FFT so multiply by 2, divide by Fs to scale.

Py = (2*Y1(1:L/2) / Fs);

% create frequency vector to plot against

freq = Fs/L*(0:L/2-1);

% plot the figure

figure

plot(freq,Py);

title('Amplitude Spectral Density');

xlabel('Frequency Hz');

ylabel('Amplitude');

grid on;

end

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dpb 2019-7-29

Please edit code to remove superfluous linefeeds and then select and use the "Code" button to format it...

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Answer 1

Vimal Rathod 2019-8-1

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https://ww2.mathworks.cn/matlabcentral/answers/473931-how-can-i-get-my-code-to-produce-fft-graph#answer_385728

The code which you have given works perfectly fine, I suspect that you are not passing an appropriate signal to the fft function.

For more information refer to the link:

https://www.mathworks.com/help/matlab/ref/fft.html

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how can i get my code to produce FFT graph.

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how can i get my code to produce FFT graph.

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