Extending the Range of Functions for Probability Distributions

A consistent, unified and extensible framework for estimation of parameters for probability distributions, including parameter estimation procedures that allow for weighted samples; the current set of distributions included are: the standard beta, The four-parameter beta, Burr, gamma, Gumbel, Johnson SB and SU, Laplace, logistic, normal, symmetric truncated normal, truncated normal, symmetric-reflected truncated beta, standard symmetric-reflected truncated beta, triangular, uniform, and Weibull distributions; decision criteria and selections based on these decision criteria.


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Reference manual

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install.packages("ExtDist")

0.6-4 by Oleksii Nikolaienko, a year ago


Browse source code at https://github.com/cran/ExtDist


Authors: Haizhen Wu <[email protected]> , A. Jonathan R. Godfrey <[email protected]> , Kondaswamy Govindaraju <[email protected]> , Sarah Pirikahu <[email protected]>


Documentation:   PDF Manual  


Task views:


GPL (>= 2) license


Imports numDeriv, optimx

Suggests ggplot2, knitr, PerformanceAnalytics, stats, SuppDists, truncdist, VGAM, xtable, graphics, utils, rmarkdown


Suggested by fitteR.


See at CRAN