Some aspects of the use of compositional data in exploratory multivariate analysis, such as cluster analysis, are reviewed. In particular, results obtained using log-ratio transformed data are contrasted with those using ratio-based comparisons deeply rooted in the Italian statistical tradition. Specifically, we seek to understand which approach gives the most useful interpretation, and why. The points made are illustrated using simulated and real data sets.
Metrics for Compositional Data
TARSITANO, Agostino;
2011-01-01
Abstract
Some aspects of the use of compositional data in exploratory multivariate analysis, such as cluster analysis, are reviewed. In particular, results obtained using log-ratio transformed data are contrasted with those using ratio-based comparisons deeply rooted in the Italian statistical tradition. Specifically, we seek to understand which approach gives the most useful interpretation, and why. The points made are illustrated using simulated and real data sets.File in questo prodotto:
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