R: The Dirichlet Distribution

Dirichlet {nimble} | R Documentation

## The Dirichlet Distribution

### Description

Density and random generation for the Dirichlet distribution

### Usage

    ddirch(x, alpha, log = FALSE)

    rdirch(n = 1, alpha)

### Arguments

`x` | vector of values.
`alpha` | vector of parameters of same length as `x`
`log` | logical; if TRUE, probability density is returned on the log scale.
`n` | number of observations (only `n=1` is handled currently).

### Details

See Gelman et al., Appendix A or the BUGS manual for mathematical details.

### Value

`ddirch` gives the density and `rdirch` generates random deviates.

### Author(s)

Christopher Paciorek

### References

Gelman, A., Carlin, J.B., Stern, H.S., and Rubin, D.B. (2004) Bayesian Data Analysis, 2nd ed. Chapman and Hall/CRC.

### See Also

Distributions for other standard distributions

### Examples

    alpha <- c(1, 10, 30)
    x <- rdirch(1, alpha)
    ddirch(x, alpha)

[Package nimble version 0.9.1 Index]