MixtureInf (version 1.0-1)

rexpmix: Random sample from a mixture of exponentials

Description

Generate a random sample for a mixture of univariate exponential distributions.

Usage

rexpmix(n, alpha, scale)

Arguments

n

number of samples

alpha

vector of mixture probabilities, with length equal to $m$, the desired number of components.

scale

vector of scales (inverse of rate) of each component.

Value

• Returns a vector of length $n$ of samples from an $m$-component mixture of univariate exponential distributions.

See Also

Functions for mixtures of other standard distributions, such as rnormmix for the normal and rpoismix for the Poisson distribution.

Examples

# Draw random samples from a mixture of two equally likely exponential
# distributions, one with scale = 1, the other with scale = 0.05
x <- rexpmix(200, c(0.5, 0.5), c(1, 20))
hist(x, probability=TRUE)
lines(density(x), col='red')