Compositional: ddiri – R documentation

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ddiri

Density values of a Dirichlet distribution

Density values of a Dirichlet distribution.

ddiri(x, a, logged = TRUE)

`x`	A matrix containing compositional data. This can be a vector or a matrix with the data.
`a`	A vector of parameters. Its length must be equal to the number of components, or columns of the matrix with the compositional data and all values must be greater than zero.
`logged`	A boolean variable specifying whether the logarithm of the density values to be returned. It is set to TRUE by default.

The density of the Dirichlet distribution for a vector or a matrix of compositional data is returned.

A vector with the density values.

Michail Tsagris

R implementation and documentation: Michail Tsagris mtsagris@uoc.gr and Giorgos Athineou <gioathineou@gmail.com>

Ng Kai Wang, Guo-Liang Tian and Man-Lai Tang (2011). Dirichlet and related distributions: Theory, methods and applications. John Wiley \& Sons.

x <- rdiri( 100, c(5, 7, 4, 8, 10, 6, 4) )
a <- diri.est(x)
f <- ddiri(x, a$param)
sum(f)
a

Compositional Data Analysis

v4.6

GPL (>= 2)

Authors

Michail Tsagris [aut, cre], Giorgos Athineou [aut], Abdulaziz Alenazi [ctb]

Initial release

2021-04-27