n by m matrix of compositions [p1, ..., pm]_i for i=1,...,n.
scale
Power scalar.
References
Pawlowsky-Glahn, V., Egozcue, J. J., & Tolosana-Delgado, R. (2007). Lecture
Notes on Compositional Data Analysis. Retrieved from
https://dugi-doc.udg.edu/bitstream/handle/10256/297/CoDa-book.pdf