Dear Researchers,
I want to perform periodicity analysis in hydro-climatology data series. I have gone through some literature but did not successfully solve the problem. Your expert opinion is required.
I have attached some pictures as an example, what I actually want.
Regards
Naveed.
Hi Naveed Ahmed ,
I never analyzed such a type of data, but I have some experience with time series data. What problems did you have performing periodicity analysis?
Hi,
If you have time domain data, you can easily calculate the periodogram using the FFT of this signal. it is just the spectrum multiplied by its conjugate.
The second image is time-frequency representation using wavelet. it is more complex to explain in few words but not too complex.
Which software are you using for your data processing?
hope it helps
A case between spectral and wavelet analysis. I agree with Julien.
Dear Ahmed
these links can help you
1-https://link.springer.com/epdf/10.1007/s12517-018-3728-7?author_access_token=rR1yH2Uyfc3V59H5RZRVEPe4RwlQNchNByi7wbcMAY7c7oYltsQbun5R4PghA_jPo9Yh4bSf4gbEOkVt8-hMlemckWG8NPe_qZj4AZc0cEmRENN10fbSC4UpWU9YFu0OZ7vjroLtxo5NzOfWP15XWg%3D%3D
2-https://www.mathworks.com/help/wavelet/ref/cwt.html
3-https://www.mathworks.com/help/wavelet/examples/time-frequency-analysis-with-the-continuous-wavelet-transform.html
4-http://www.ece.northwestern.edu/local-apps/matlabhelp/toolbox/wavelet/cwt.html
best regards, Bilel
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