Description Usage Arguments Details Value Author(s) Source References See Also Examples
This function generates random values from the Basu-Dhar bivariate geometric distribution assuming arbitrary parameter values.
1 2 |
n |
number of observations. If length(n) > 1, the length is taken to be the number required. |
theta |
vector (of length 3) containing values of the parameters θ_1, θ_2 and θ_{3} of the Basu-Dhar bivariate Geometric distribution. The parameters are restricted to 0 < θ_i < 1, i = 1,2 and 0 < θ_{3} ≤ 1. |
The conditional distribution of X given Y is given by:
If X < Y, then
P(X = x | Y = y) = θ_1^{x - 1}(1 - θ_1)
If X = Y, then
P(X = x | Y = y) = \frac{θ_1^{x - 1}(1 - θ_1 θ_{3} - θ_2 θ_{3} + θ_1 θ_2 θ_{3})}{1 - θ_2 θ_{3}}
If X > Y, then
P(X = x | Y = y) = \frac{θ_1^{x - 1} θ_{3}^{x - y}(1 - θ_{1} θ_{3}) (1 - θ_2)}{1 - θ_2 θ_{3}}
rbivgeo1
and rbivgeo2
generate random deviates from the Bash-Dhar bivariate geometric distribution. The length of the result is determined by n, and is the maximum of the lengths of the numerical arguments for the other functions.
Invalid arguments will return an error message.
Ricardo P. Oliveira rpuziol.oliveira@gmail.com
Jorge Alberto Achcar achcar@fmrp.usp.br
rbivgeo1
generates random deviates using the inverse transformation method. Returns a matrix that the first column corresponds to X generated random values and the second column corresponds to Y generated random values.
rbivgeo2
generates random deviates using the shock model. Returns a matrix that the first column corresponds to X generated random values and the second column corresponds to Y generated random values. See Marshall and Olkin (1967) for more details.
Marshall, A. W., & Olkin, I. (1967). A multivariate exponential distribution. Journal of the American Statistical Association, 62, 317, 30-44.
Basu, A. P., & Dhar, S. K. (1995). Bivariate geometric distribution. Journal of Applied Statistical Science, 2, 1, 33-44.
Li, J., & Dhar, S. K. (2013). Modeling with bivariate geometric distributions. Communications in Statistics-Theory and Methods, 42, 2, 252-266.
Achcar, J. A., Davarzani, N., & Souza, R. M. (2016). Basu<e2><80><93>Dhar bivariate geometric distribution in the presence of covariates and censored data: a Bayesian approach. Journal of Applied Statistics, 43, 9, 1636-1648.
de Oliveira, R. P., & Achcar, J. A. (2018). Basu-Dhar's bivariate geometric distribution in presence of censored data and covariates: some computational aspects. Electronic Journal of Applied Statistical Analysis, 11, 1, 108-136.
Geometric
for the univariate geometric distribution.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | rbivgeo1(n = 10, theta = c(0.5, 0.5, 0.7))
# [,1] [,2]
# [1,] 2 1
# [2,] 3 1
# [3,] 1 1
# [4,] 1 1
# [5,] 2 2
# [6,] 1 3
# [7,] 2 2
# [8,] 1 1
# [9,] 1 1
# [10,] 2 2
rbivgeo2(n = 10, theta = c(0.5, 0.5, 0.7))
# [,1] [,2]
# [1,] 1 1
# [2,] 2 1
# [3,] 2 1
# [4,] 4 1
# [5,] 1 1
# [6,] 2 2
# [7,] 3 2
# [8,] 3 1
# [9,] 3 2
# [10,] 1 1
|
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