compositions (version 2.0-8)

rpois: Simulate count compositions without overdispersion

Description

Generates multinomial or multi-Poission random variates based on an Aitchison composition.

Usage

rpois.ccomp(n,p,lambda)
rmultinom.ccomp(n,p,N)

Value

a random dataset ccount dataset

Arguments

n

number of datasets to be simulated

p

The composition representing the probabilites/portions of the individual parts

lambda

scalar or vector giving the expected total count

N

scalar or vector giving the total count

Author

K.Gerald v.d. Boogaart http://www.stat.boogaart.de

Details

A count composition is a realisation of a multinomial or multivariate Poisson distribution.

See Also

rnorm.ccomp

Examples

p <- acomp(c(3,3,3))
rpois.ccomp(10,p,40)
rmultinom.ccomp(10,p,40)