Compositional Data Statistics and Analysis (GR-EADC) Research group The central subject matter giving cohesion to the research group is compositional data statistical analysis. In the areas of Geology, Petrology, Chemistry, Economic, Archaeometry, etc. it is usual to work with data vectors whose components represent the relative contribution of several parts in relation to a total giving rise to compositional samples.The group’s general goal is to make headway in compositional data statistical analysis and its mathematical foundation. The developed techniques’ range of application is very extensive.