gammaproposal: A proposal for gamma parameter

In NegBinBetaBinreg: Negative Binomial and Beta Binomial Bayesian Regression Models

Description

Propose a value for the gamma parameter

Usage

gammaproposal(y, x, z, betas.ini,gammas.ini,gpri,Gpri,model,m,ni)

Arguments

y	object of class matrix, with the dependent variable
x	object of class matrix, with the variables for modelling the mean
z	object of class matrix, with the variables for modelling the variance
betas.ini	a vector with the previous proposal beta parameters
gammas.ini	a vector with the previous proposal gamma parameters
gpri	a vector with the initial values of gamma
Gpri	a matrix with the initial values of the variance of gamma
model	it indicates the model that will be used. By default, is the Beta Binomial model (BB), but it could also be the Negative Binomial with mean and shape (NB1) or the Negative Binomial with mean and variance (NB2).
m	It is positive integer that In the Beta Binomial model indicates the number of trials. By default, is the number of data
ni	It is a vector of positive integer that In the Beta Binomial model indicates the number of trials to each individual. By default, is a vector of m

Details

Generate a proposal for the gamma parameter according to the model proposed by Cepeda(2001) and Cepeda and Gamerman(2005).

Value

value

a number with the proposal for the gamma parameter

Author(s)

Edilberto Cepeda-Cuervo [e-mail], Maria Victoria Cifuentes-Amado [e-mail], Margarita Marin [e-mail]

References

1. Cepeda C. E. (2001). Modelagem da variabilidade em modelos lineares generalizados. Unpublished Ph.D. tesis. Instituto de Matematicas. Universidade Federal do Rio do Janeiro. //http://www.docentes.unal.edu.co/ecepedac/docs/MODELAGEM20DA20VARIABILIDADE.pdf. http://www.bdigital.unal.edu.co/9394/. 2.Cepeda, E. C. and Gamerman D. (2005). Bayesian Methodology for modeling parameters in the two-parameter exponential family. Estadistica 57, 93 105. // 3.Cepeda, E. and Garrido, L. (2011). Bayesian beta regression models: joint mean and precision modeling. Universidad Nacional // 4.Cepeda, E. and Migon, H. and Garrido, L. and Achcar, J. (2012) Generalized Linear models with random effects in the two parameter exponential family. Journal of Statistical Computation and Simulation. 1, 1 13. // 5.Cepeda-Cuervo, E. and Cifuentes-Amado, V. (2016) Double generalized beta-binomial and negative binomial regression. To appear.

NegBinBetaBinreg documentation built on May 2, 2019, 10:52 a.m.