ddirichlet: Dirichlet Distribution

In SciencesPo: A Tool Set for Analyzing Political Behavior Data

Description

Density function and random number generation for the Dirichlet distribution

Usage

ddirichlet(x, alpha, log = FALSE, sum = FALSE)

Arguments

x	a matrix containing observations.
alpha	the Dirichlet distribution's parameters. Can be a vector (one set of parameters for all observations) or a matrix (a different set of parameters for each observation), see “Details”.
log	if TRUE, logarithmic densities are returned.
sum	if TRUE, the (log-)likelihood is returned.

Value

the ddirichlet returns a vector of densities (if sum = FALSE) or the (log-)likelihood (if sum = TRUE) for the given data and alphas.

Author(s)

Daniel Marcelino, [e-mail]

Examples

mat <- cbind(1:10, 5, 10:1);
mat;
x <- rdirichlet(10, mat);

ddirichlet(x, mat);

SciencesPo documentation built on May 29, 2017, 9:28 p.m.