rdirichlet {mixstock} | R Documentation

## Dirichlet deviates

### Description

Produces random deviates for the Dirichlet distribution, the multivariate analogue of the beta distribution.

### Usage

    rdirichlet(n, alpha)

### Arguments

`n` | Number of random deviates to generate.
`alpha` | Vector of shape parameters.

### Details

The Dirichlet distribution is a multivariate distribution that describes distributions of frequencies. If a multinomial sample n_1, ... n_N is taken from a population, the estimated distribution of frequencies is Dirichlet(n_1+1, ... n_2+N). If {g_i} is a set of Gamma deviates with shape parameters {α_i}, then {g_i}/sum({g_i}) is a Dirichlet deviate.

### Value

A matrix of random deviates (each in a distinct row) from `rdirichlet`

### Author(s)

Ben Bolker

### Examples

      rdirichlet(5,c(7,4,4))

[Package mixstock version 0.9.2 Index]