nb_sum_moments {nbconv}

Method of moments

Description

Implements the method of moments approximation for the sum of arbitrary NB random variables. Called by other functions. Not intended to be run alone.

Usage

nb_sum_moments(mus, phis, counts)

Arguments

mus

Vector of individual mean values.

phis

Vector of individual dispersion parameters. Equivalent to 'size' in dnbinom.

counts

The vector of counts over which the PMF is evaluated.

Value

A numeric vector of probability densities.

Examples

nb_sum_moments(mus = c(100, 10), phis = c(5, 8), counts = 0:500)