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trawl (version 0.2.2)

fit_marginalNB: Fist a negative binomial distribution as marginal law

Description

Fist a negative binomial distribution as marginal law

Usage

fit_marginalNB(x, LM, plotdiag = FALSE)

Arguments

x

vector of equidistant time series data

LM

Lebesgue measure of the estimated trawl

plotdiag

binary variable specifying whether or not diagnostic plots should be provided

Value

m: parameter in the negative binomial marginal distribution

theta: parameter in the negative binomial marginal distribution

a: Here \(a=\theta/(1-\theta)\). This is given for an alternative parametrisation of the negative binomial marginal distribution

Details

The moment estimator for the parameters of the negative binomial distribution are given by $$\hat \theta = 1-\mbox{E}(X)/\mbox{Var}(X),$$ and $$\hat m = \mbox{E}(X)(1-\hat \theta)/(\widehat{ \mbox{LM}} \hat \theta).$$