Now showing items 1-4 of 4

  • Bayes linear spaces 

    Van den Boogaart, Karl Gerard; Egozcue Rubí, Juan José; Pawlowsky-Glahn, Vera (2010-12)
    Article
    Open Access
    Linear spaces consisting of $\sigma$-finite probability measures and infinite measures (improper priors and likelihood functions) are defined. The commutative group operation, called perturbation, is the updating given by ...
  • Proportionality: a valid alternative to correlation for relative data 

    Lovell, David; Pawlowsky-Glahn, Vera; Egozcue Rubí, Juan José; Marguerat, Samuel; Baehler, Juerg (2015-03-01)
    Article
    Open Access
    In the life sciences, many measurement methods yield only the relative abundances of different components in a sample. With such relative-or compositional-data, differential expression needs careful interpretation, and ...
  • Spatial analysis of compositional data : a historical review 

    Pawlowsky-Glahn, Vera; Egozcue Rubí, Juan José (2016-05-01)
    Article
    Open Access
    Like the statistical analysis of compositional data in general, spatial analysis of compositional data requires specific tools. A historical overview of their development is presented in three steps: (a) the recognition ...
  • The normal distribution in some constrained sample spaces 

    Mateu-Figueras, Glòria; Pawlowsky-Glahn, Vera; Juan José, Egozcue (Institut d'Estadística de Catalunya, 2013)
    Article
    Open Access
    Phenomena with a constrained sample space appear frequently in practice. This is the case, for example, with strictly positive data, or with compositional data, such as percentages or proportions. If the natural measure ...