Simulate count compositions without overdispersion

Description

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

Usage

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

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

Details

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

Value

a random dataset ccount dataset

Author(s)

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

See Also

rnorm.ccomp

Examples

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

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