| TrendSSA {greenbrown} | R Documentation |
The function computes a non-linear trend based on ssa. Please note: Use the function TrendSeasonalAdjusted with the option funSeasonalCycle=SSASeasonalCylce to compute a linear trend with breakpoint detection based on a seasonal adjusted time series (method "SSA" as desribed in Forkel et al. 2013).
TrendSSA(Yt, ...)
Yt |
univariate time series of class |
... |
additional arguments (currently not used) |
The function returns a list of class "Trend".
Matthias Forkel <matthias.forkel@geo.tuwien.ac.at> [aut, cre]
ssa
## load a time series of NDVI (normalized difference vegetation index) #data(ndvi) #plot(ndvi) # ## calculate trend on mean annual NDVI values #trd <- TrendSSA(ndvi) #trd #plot(trd)