Titlebook: Compositional Data Analysis; CoDaWork, L’Escala, Josep Antoni Martín-Fernández,Santiago Thió-Henest Conference proceedings 2016 Springer I

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,Die Burgenpolitik der Staufer im Elsa?,s Spectrometry (LA-ICP-MS), specially in the case that the quantities of interest are linear functions of (log)-ratios. These quantities are scale invariant, but in general cannot be estimated without taking into account possible additive noise effects of the instrumentation, incompatible with a pur

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https://doi.org/10.1007/978-3-662-10049-3Using an approach based on the Aitchison geometry of the simplex, a Shifted-Dirichlet covariate model is obtained. Allowing the parameters to change linearly with a set of covariates, their effects on the relative contributions of different components in a composition are assessed. An application of this model to sedimentary petrography is given.

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A Regression Model for Compositional Data Based on the Shifted-Dirichlet Distribution,Using an approach based on the Aitchison geometry of the simplex, a Shifted-Dirichlet covariate model is obtained. Allowing the parameters to change linearly with a set of covariates, their effects on the relative contributions of different components in a composition are assessed. An application of this model to sedimentary petrography is given.

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