Extended Chen-Poisson Lifetime Distribution

2025-07-25

ecpdist

ecpdist is a package for working with the Chen and the Extended Chen-Poisson Lifetime Distributions. It provides functions to compute:

• Cumulative distribution, survival, density, hazard, and cumulative hazard functions

• Quantile function

• Graphics for these functions

• Random samples

• Measures of skewness and kurtosis

• k-th raw moments and conditional k-th moments

• Mean residual life function

More features may be added soon!

Installation

Development version from GitHub

To install the development version from GitHub, run:

# If you haven't already installed devtools, you may need to install it first:
install.packages("devtools")

# devtools::install_github("abreu-uma/ecpdist")
install.packages("ecpdist", repos = c('https://abreu-uma.r-universe.dev', 'https://cloud.r-project.org'))

From CRAN (still does not have the Chen distribution)

You can install the previous released version of ecpdist from CRAN with:

install.packages("ecpdist")

References

Sousa-Ferreira, I., Abreu, A.M. & Rocha, C. (2023). The Extended Chen-Poisson Lifetime Distribution. REVSTAT – Statistical Journal, 21(2), 173-196. https://doi.org/10.57805/revstat.v21i2.405

Contact information

abreu@staff.uma.pt