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namakala / medication-trend

Exploring the Trend of Medication Uses from IADB Database
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86cuhtr9g - Extract the power spectrum of detrended data #9

Closed lamurian closed 7 months ago

lamurian commented 7 months ago

https://app.clickup.com/t/86cuhtr9g

  1. Extract the power spectrum of detrended data
lamurian commented 7 months ago

Found further clue for spectral analysis here: https://math.mcmaster.ca/~bolker/eeid/2010/Ecology/Spectral.pdf

lamurian commented 7 months ago

Singular spectrum analysis and forecasting with R: https://www.sciencedirect.com/science/article/pii/S0167947313001394

lamurian commented 7 months ago

Singular spectrum analysis (SSA) is similar to PCA in a way that we can decompose a time-series signal into its constructing series of trend and sine/cosine combinations. Check out: