[RFC]: adding new statistical distributions ( tracking issue )

[vivekmaurya001]

Description

This RFC proposes adding new distributions in stdlib which expands the collection of continuous , discrete, and multivariate distributions. This will be a tracking issue for new distributions which can be added

Distribution Checklist

Continuous Distributions

• [ ] Anglit
• [ ] Burr
• [ ] Burr12
• [ ] Crystalball
• [ ] Dgamma
• [ ] Exponorm
• [ ] Exponweib
• [ ] Loglaplace
• [ ] Foldnorm
• [ ] Genlogistic
• [ ] Gennorm
• [ ] Genpareto
• [ ] GaussHyper
• [ ] Gengamma
• [ ] Gibrat
• [ ] Lomax
• [ ] Rdist
• [ ] Halfcauchy
• [ ] Half-logistic
• [ ] Half-normal
• [ ] Hypsecant
• [ ] Inweibull
• [ ] JohnsonSB
• [ ] JohnsonSU
• [ ] Powerlaw
• [ ] Wrapcauchy
• [ ] Moyal
• [ ] Maxwell
• [ ] Mielke
• [ ] Nakagami
• [ ] Laplace asymmetric
• [ ] Powernorm
• [ ] Truncexpo
• [ ] Skewcauchy
• [ ] Argus
• [ ] Dweibull
• [ ] Exponpow
• [ ] Fatiguelife
• [ ] Fisk
• [ ] Foldcauchy
• [ ] Powerlognorm
• [ ] Pearson3
• [ ] Rice
• [ ] Vonmises
• [ ] Tukeylambda
• [ ] Recipinvgauss
• [ ] Skewnorm
• [ ] Genexpon
• [ ] Gompertz
• [ ] Halfgenorm
• [ ] Invgauss
• [ ] Loggamma
• [ ] Wald
• [ ] Trapezoid
• [ ] Truncnorm
• [ ] Semicircular
• [ ] Dpareto
• [ ] Genextreme
• [ ] Genhyperbolic
• [ ] Geninvgauss
• [ ] Irwinhall
• [ ] JF_skew_t
• [ ] Kappa4
• [ ] Kappa3
• [ ] Ksone
• [ ] Kstwo
• [ ] Landau
• [ ] NCX2
• [ ] NCF
• [ ] NCT
• [ ] Relbretwinger

Discrete Distributions

• [ ] Betabinom
• [ ] Boltzman
• [ ] Dlaplace
• [ ] Geom
• [ ] Loyser
• [ ] Nbinom
• [ ] Yulesimon
• [ ] Zipf
• [ ] Randint
• [ ] Zipfian
• [ ] Nchypergeomfisher
• [ ] Nchypergeomwallnus
• [ ] Nhypergeom
• [ ] Poissonbinom
• [ ] Skellam

Multivariate Distributions

• [ ] Multivariate Hypergeometric
• [ ] Normal Inverse Gamma
• [ ] Random Table
• [ ] Multivariate Normal
• [ ] Matrix Normal
• [ ] Dirichlet
• [ ] Dirichlet Multinomial
• [ ] Wishart
• [ ] Inverse Wishart
• [ ] Multinomial
• [ ] Special Orthogroup
• [ ] Orthogroup
• [ ] Random Correlation

Related Issues

Related issues # , # , and # .

Questions

No.

Other

No.

Checklist

• [x] I have read and understood the Code of Conduct.
• [x] Searched for existing issues and pull requests.
• [x] The issue name begins with RFC:.

[0PrashantYadav0]

@kgryte Your thought on this ? Do we have to include or exclude any distributions ?

[riyap03]

Hey everyone! I'm Riya — a 2nd-year CS student from India and a hopeful GSoC 2026 contributor.

I’ve been exploring the stdlib repo recently and came across this incredible RFC. It’s super exciting to see such a rich list of distributions being proposed. I'd love to get started by contributing to one — maybe something like Lomax, Foldnorm, or even Poissonbinom to begin with.

Would it be okay if I open a sub-issue or start a draft PR? I’d really appreciate any pointers on where to start.

Thanks for keeping this project so open and beginner-friendly 💙
— Riya (@riyap03)

[anujmishra03]

Hi 👋, I’m Anuj Mishra, and I’d like to contribute to this issue by implementing the Half-Normal distribution (@stdlib/stats/base/dists/halfnormal).

I plan to start with the PDF (Probability Density Function) implementation following the existing structure used for other distributions (e.g. normal, lognormal):

• lib/index.js for the main implementation
• test/test.pdf.js for test cases
• fixtures/r/data.json for reference data
• README.md with short documentation

Once the PDF implementation is complete, I’ll extend it with CDF, mean, and variance in follow-up PRs.

Could you please assign this issue to me so I can start working on it?
Thank you! 😊