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ExtDist: 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.

Online version of documentation is available at GitHub Pages.

Updates

0.7-1 (2023-01-16)

Long-standing bug in Weibull and gamma distributions was fixed:

  • for gamma distribution, scale parameter was passed as a rate in stats::*gamma calls

  • for Weibull distribution, stats::*gamma was called instead of stats::*weibull

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Version

Install

install.packages('ExtDist')

Monthly Downloads

567

Version

0.7-2

License

GPL (>= 2)

Last Published

August 21st, 2023

Functions in ExtDist (0.7-2)

Beta_ab

The four-parameter beta distribution.
JohnsonSB

The Johnson SB distribution.
Exponential

The Exponential Distribution.
JohnsonSU

The Johnson SU distribution.
Burr

The Burr Distribution.
Gumbel

The Gumbel distribution
wmle

Weighted Maximum Likelihood Estimation.
ExtDist-package

Extended Probability Distribution Functions
Laplace

The Laplace Distribution.
Logistic

The Logistic Distribution.
DistSelCriteria

Distribution Selection Criteria.
Uniform

The Uniform Distribution.
Weibull

The Weibull Distribution.
SSRTB

The standard symmetric-reflected truncated beta (SSRTB) distribution.
Normal_trunc_ab

The truncated normal distribution.
Normal

The Normal Distribution.
Normal_sym_trunc_ab

The symmetric truncated normal distribution.
SRTB_ab

The symmetric-reflected truncated beta (SRTB) distribution.
bestDist

Finding the best distribution for a (weighted) sample.
Triangular

The Triangular Distribution.
eDist

S3 methods for manipulating eDist objects.
compareDist

Compare a sample to one or more fitted distributions
eval.estimation

Parameter Estimation Evaluation.
Beta

The Standard Beta Distribution.
Gamma

The Gamma Distribution.