R-universe - t-momozaki (Tomotaka Momozaki)

mhn - The Modified Half-Normal Distribution

Provides density, distribution, quantile, and random generation functions for the Modified Half-Normal (MHN) distribution, along with moments and mode; the Fox-Wright Psi normalizing constant is evaluated internally. The MHN distribution arises as a conditional posterior in Bayesian Markov chain Monte Carlo and generalizes the half-normal, truncated normal, and square-root gamma distributions. Implements efficient sampling via Algorithms 1 and 3 of Sun, Kong & Pal (2023) <doi:10.1080/03610926.2021.1934700>, the relaxed transformed density rejection method of Gao & Wang (2025) <doi:10.1080/03610918.2025.2524551>, and, for the truncated normal special case, the sampler of Robert (1995) <doi:10.1007/BF00143942>.

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cpp

4.85 score 6 scripts 475 downloads

clmstan - Cumulative Link Models with 'CmdStanR'

Fits cumulative link models (CLMs) for ordinal categorical data using 'CmdStanR'. Supports various link functions including logit, probit, cloglog, loglog, cauchit, and flexible parametric links such as Generalized Extreme Value (GEV), Asymmetric Exponential Power (AEP), and Symmetric Power. Models are pre-compiled using the 'instantiate' package for fast execution without runtime compilation. Methods are described in Agresti (2010, ISBN:978-0-470-08289-8), Wang and Dey (2011) <doi:10.1007/s10651-010-0154-8>, and Naranjo, Perez, and Martin (2015) <doi:10.1007/s11222-014-9449-1>.

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4.18 score 287 downloads