Plot power spectrum from FFT
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Hi,
I want to plot power spectrum using FFT. I use the below code but I didn't get the spectrum and instead I got the below graph.
Please advise where my code is wrong. Thanks
x = xlsread('testcode.xlsx'); fs = 100; x = x';
y = fft(x);
n = length(x); % number of samples
f = (0:n-1)*(fs/n); % frequency range
power = abs(y).^2/n; % power of the DFT
plot(f,power)
xlabel('Frequency')
ylabel('Power')
0 Commenti
Risposte (0)
Vedere anche
Categorie
Scopri di più su Fourier Analysis and Filtering in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!