The Unifed Distribution

Probability functions, family for glm() and Stan code for working with the unifed distribution (Quijano Xacur, 2019; ).

The unifed distribution is the only exponential dispersion family containing the exponential distribution. This R package contains function for working with this distribution.

An R vignette introducing the unifed distribution and examples of how to use this package can be found at

Important Note

The function in version 1.0 of the package returns values with the wrong sign when its argument is less than 0.1.

Please update to the current version to avoid this issue.


You can install this package directly from CRAN by typing this in your R console.


Side effects

Note that this package rewrites the summary method from the glm class. This will not break any code you have that uses the summary function since it is simply a wrapper around stats::summary.glm that sets the dispersion parameter equal to 1 when working with a unifed GLM.


Reference manual

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1.1.5 by Oscar Alberto Quijano Xacur, 9 months ago

Browse source code at

Authors: Oscar Alberto Quijano Xacur [aut,cre]

Documentation:   PDF Manual  

GPL (>= 3) license

Depends on methods

Suggests knitr, rmarkdown, testthat, rstan, data.table

See at CRAN