gammaproposal: A proposal for gamma parameter

Description Usage Arguments Details Value Author(s) References

Description

Propose a value for the gamma parameter

Usage

1
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 ecepedac@unal.edu.co, Maria Victoria Cifuentes-Amado mvcifuentesa@unal.edu.co, Margarita Marin mmarinj@unal.edu.co

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 Unpublished Ph.D. tesis.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.