Help filtering data with unequal/uneven sampling
5 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello,
I am trying to compute the autocorrelation of data sampled at uneven time intervals. My measurements correspond to the axial velocity of a flow, and I record a data point at every time a tracer particle is recognized, which can occur at any time.
I have a method for computing the autocorrelation function which has been tested previously; however the present data has a non-zero assymptote (i.e., the autocorrelation levels off at about 0.1). I believe this is due to noise in the system, and would like to try and filter my data, however I am not sure the best way to do this.
Is matlab's built in fdesign filters intended to work with unequal sampling times? I can determine an average sampling rate, but I don't know if that's appropriate. Is there another method for filtering this kind of data?
Thank you very much for your help,
- Tim Wabel
3 commentaires
dpb
le 30 Juil 2014
I don't know what to think to tell you w/ that kind of variability...not sure what it means not knowing much about the situation. Looks difficult, though...
Réponses (0)
Voir également
Catégories
En savoir plus sur Filter Analysis 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!