Polar coordinate based functions useful for analyzing seasonal patterns in environmental variables, which reduces the multitude of input values to a smaller set of seasonal metrics (e.g., length of season, seasonality) that quantify the features of each annual (or diel) cycle. Functions are generalized to work on any time series with cycles of any length (daily, annual, interannual), but were developed for improved interannual analysis of land surface phenology data (NDVI).
Package details 


Author  Bjorn J. Brooks, Danny C. Lee, William W. Hargrove, Lars Y. Pomara 
Maintainer  Bjorn J. Brooks <bjorn@geobabble.org> 
License  GPL (>=3) 
Version  0.1.0 
Package repository  View on GitHub 
Installation 
Install the latest version of this package by entering the following in R:

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