Exponential family distributions | Multivariate continuous distributions | Continuous distributions | Conjugate prior distributions

Grouped Dirichlet distribution

In statistics, the grouped Dirichlet distribution (GDD) is a multivariate generalization of the Dirichlet distribution It was first described by Ng et al. 2008. The Grouped Dirichlet distribution arises in the analysis of categorical data where some observations could fall into any of a set of other 'crisp' category. For example, one may have a data set consisting of cases and controls under two different conditions. With complete data, the cross-classification of disease status forms a 2(case/control)-x-(condition/no-condition) table with cell probabilities If, however, the data includes, say, non-respondents which are known to be controls or cases, then the cross-classification of disease status forms a 2-x-3 table. The probability of the last column is the sum of the probabilities of the first two columns in each row, e.g. The GDD allows the full estimation of the cell probabilities under such aggregation conditions. (Wikipedia).

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(ML 7.7.A1) Dirichlet distribution

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From playlist Machine Learning

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From playlist Sampling Distributions in Statistics (WK 12 - QBA 237)

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From playlist Mathematics

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The Dirichlet distribution is a conjugate prior for the Categorical distribution (i.e. a PMF a finite set). We derive the posterior distribution and the (posterior) predictive distribution under this model.

From playlist Machine Learning

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The Dirichlet distribution is a conjugate prior for the Categorical distribution (i.e. a PMF a finite set). We derive the posterior distribution and the (posterior) predictive distribution under this model.

From playlist Machine Learning

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From playlist Statistics: Describing Data

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Multivariate Gaussian distributions

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From playlist cs273a

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From playlist Neat proofs/perspectives

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From playlist The Sato-Tate conjecture for abelian varieties

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From playlist Mathematics

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From playlist Global Noncommutative Geometry Seminar (Europe)

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From playlist Unit 2: Normal Distributions

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From playlist Mathematics

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From playlist The Normal Distribution

Related pages

Dirichlet distribution | Categorical variable | Statistics | Beta function