FFT: Amplitude 3D Spectrum of a time series
21 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I have a synchronously sampled time series. I wish to plot the 3D spectra of the time series (time (seconds), frequency (Hz), amplitude (dB)).
Does matlab have a built in tool for this? I cant see how to get it out of periodogram etc.
thank you
T = 1000;
t = 1: T;
ts = randn(T,1);
Fs = 50; %the sampling frequency.
Ns = 10; %the frequency resolution.
xa=[0 Fs];
%I want to find the amplitude.
amp = ?? %amp is a matrix size (Ns x T)
imagesc(t,xa,(20*log10(amp)));
title('\bf Time series Spectrum');
xlabel('\bf Time');
ylabel('\bf Frequency (Hz)');
colorbar; %the color is the amplitude (in dB)
0 commentaires
Réponse acceptée
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Spectral Measurements dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!