The Mathematics of Compositional Analysis

Austrian Journal of Statistics

article

Carles Barcelo-Vidal¹  Josep-Antoni Martín-Fernández¹ 

[1] University of Girona

关键词: composition;    compositional analysis;    equivalence class;    logratio;    quotient space;    simplex.;   

DOI  :  10.17713/ajs.v45i4.142

学科分类：医学（综合）

来源: Austrian Statistical Society

【 摘 要 】

The term compositional data analysis is historically associated to the approach based on the logratio transformations introduced in the eighties. Two main principles of this methodology are scale invariance and subcompositional coherence. New developments and concepts emerged in the last decade revealed the need to clarify the concepts of compositions, compositional sample space and subcomposition. In this work the mathematics of compositional analysis based on equivalence relation is presented. The two principles are essential attributes of the corresponding quotient space. A logarithmic isomorphism between quotient spaces induces a metric space structure for compositions. Using this structure, the statistical analysis of compositions consists of analysing logratio coordinates.

【 授权许可】

CC BY