Karel Hron

Robust principal component analysis for compositional tables

2020 · Journal of Applied Statistics

A data table arranged according to two factors can often be considered a compositional table. An example is the number of unemployed people, split according to gender and age classes. Analyzed as compositions, the relevant …

Orthonormal pairwise logratio selection (OPALS) algorithm for compositional data analysis in high dimensions

2025 · Institutional Repository (IHS Vienna)

In the analysis of compositional data, the most fundamental information is conveyed by the pairwise logratios between components. While logratio coordinate representations, such as balances and pivot coordinates, are widely used to aggregate such information …