MNAR has the highest priority, MAR afterwards, and WZERO (BDL,SZ) values are
considered as 0 and finally reported as BDL.
Details
The amalgamation column is simply computed by taking the
geometric mean of the non-selected components. This is
consistent with the acomp approach and gives clear ternary
diagrams. However, this geometric mean is difficult to interpret.
References
Vera Pawlowsky-Glahn (2003) personal communication.
Universitat de Girona.
van den Boogaart, K.G. and R. Tolosana-Delgado (2008)
"compositions": a unified R package to analyze Compositional Data,
Computers & Geosciences, 34 (4), pages 320-338,
tools:::Rd_expr_doi("10.1016/j.cageo.2006.11.017").