categorical: The Categorical Distribution
In lcmix: Layered and chained mixture models

Description Usage Arguments Details Value Author(s) See Also

Density and random generation functions for the categorical distribution.

1 2	dcategorical(x, prob, log=FALSE) rcategorical(n, prob)

`x`	vector of integers between 1 and some integer K, inclusive.
`prob`	vector of probabilities such that `sum(prob) = 1` and `length(prob)` = K.
`log`	logical; if `TRUE`, density is given as the log-density.
`n`	number of observations.

The categorical distribution is a special case of the multinomial distribution with size 1. Values may be between 1 and some integer K, inclusive. If the random variable X is categorical with probability vector p of length K, then P(X=x) = p_x. The density is

f(x) = prod_k p_k^I(x=k) = p_x

where I(.) is the indicator function and k = 1,…,K.

dcategorical gives the density and rcategorical generates random deviates.

Daniel Dvorkin

Multinom in package stats.

lcmix documentation built on May 2, 2019, 6:49 p.m.