How can i plot frequency response from 25000 time domain Data?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Hello every body, I have near 25000 time domain data, they are from a idustrial plant, I have both input and output data. I want plot frequency response by using this time domain data, please help me how it is possible? Thanks alot.
6 Kommentare
dpb
am 20 Mär. 2015
Bearbeitet: dpb
am 20 Mär. 2015
I think you're barking up the wrong tree first here; you need to learn something about signal processing and data collection basics first to ensure your data have any meaning before just applying tools. Perhaps the reason the results aren't what you expect is that the data aren't any good...
But, to see what frequency content is contained in the sampled data, there's a very good, concise example of an amplitude spectrum computed via the fft at
doc fft
The Signal Processing toolbox also has the function tfestimate for transfer function estimation and the spectrum function which has multitude of options for estimating spectra.
Again, however, unless there's something actually in the dataset you've collected, none of these can fix corrupted data obtained without adequate protection during that process, whatever it was.
Antworten (1)
Image Analyst
am 20 Mär. 2015
Look up pwelch() in the Signal Processing Toolbox: http://www.mathworks.com/products/signal/features.html#spectral-analysis
2 Kommentare
Siehe auch
Kategorien
Mehr zu Spectral Measurements finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!