The function computes and displays a matrix of Robust ilr Stabilities (Filzmoser et al., 2010) and medians of log-ratios in the upper and lower triangles, respectively.
a matrix, or sub-matrix, of parts from a compositional data set.
Any less than detection limit values represented by negative values, or zeros or other numeric codes representing blanks in the data, must be removed prior to executing this function, see
Any data vectors (rows) containing
NAs are removed prior to computation.
This function is for used with closed compositional data sets, i.e. geochemical analyses. For the ‘classical’ Aitchison (1984, 1986) approach see
Robert G. Garrett
Aitchison, J., 1984. The statistical analysis of geochemical compositions. Mathematical Geology, 16(6):531-564.
Aitchison, J., 1986. Ths Statistical Analysis of Compositional data. Chapman and Hall, London, U.K., 416 p.
Filzmoser, P, Hron, K. and Reimann, C., 2010. The bivariate statistical analysis of environmental (compositional) data. Science of the Total Environment, 408(19):4230-4238.
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