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deseason

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deseason

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26 Aug 2013 (Updated )

Remove the seasonal signal from a daily time series of data.

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Description

Remove the daily mean value from a multi-year time series. The time series t and y must be vectors of equal length and t must be daily values in datenum format.

y_deseasoned = deseason(t,y); returns the deseasoned y signal.

[y_ds,y_s] = deseason(t,y); returns the deseasoned y signal and the extracted seasonal signal such that y = y_s + y_ds.

[y_ds,y_s,annualsig] = deseason(t,y); also returns a vector of length 366 containing the annual signal where the index of annualsig corresponds to the day of the year.

This function requires Anthony Kendall's date2doy function available on the Mathworks FEX site: http://www.mathworks.com/matlabcentral/fileexchange/18316

Acknowledgements

Date To Decimal Day Of Year, Get Climate Teleconnection Indices, and Get Land Surface Temperatures inspired this file.

Required Products MATLAB
MATLAB release MATLAB 8.0 (R2012b)
Other requirements Requires date2doy FEX submission 18316.
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Updates
31 Jan 2014

Changed behavior! Now restores DC offset.

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