Regression, classification, contour plots, hypothesis testing and fitting of distributions for compositional data
are some of the functions included. The standard textbook for such data is John Aitchison's (1986) "The statistical
analysis of compositional data". Relevant papers include a) Tsagris M.T., Preston S. and Wood A.T.A. (2011).
A data-based power transformation for compositional data. Fourth International International Workshop on Compositional
Data Analysis. b) Tsagris M. (2014). The k-NN algorithm for compositional data: a revised approach with and without zero
values present. Journal of Data Science, 12(3):519--534. c) Tsagris M. (2015). A novel, divergence based, regression for
compositional data. Proceedings of the 28th Panhellenic Statistics Conference, 15-18 April 2015, Athens, Greece, 430--444.
d) Tsagris M. (2015). Regression analysis with compositional data containing zero values. Chilean Journal of Statistics,
6(2):47--57. e) Tsagris M., Preston S. and Wood A.T.A. (2016). Improved supervised classification for compositional data
using the alpha-transformation. Journal of Classification, 33(2):243--261.