The Stan Forums

Topic	Replies	Views	Activity
StanCon 2026 registration and abstract submission are now open! Announcements Hi everyone! Registration for StanCon 2026 in Uppsala, Sweden, is now open! You can already register and submit abstracts for contributions. Our first keynote speaker will be announced soon. New this StanCon: In additi…	1	243	December 11, 2025
Welcome to the Stan Forums! The Stan Forums provide a community for asking and answering questions about all aspects of Stan. Before creating a new topic please search the Forums to see if your questions has already been answered. When posting ne…	3	16040	August 26, 2022
How to choose matrices in an univariate dynamic probit model for online inference (Assumed Density Filter) General	3	32	December 19, 2025
Is there a way to accelerate this BetaBinomial and DirichletMultinomial model? Modeling rstan , fitting-issues , specification	0	2	December 19, 2025
Code optimization & reduce_sum Modeling rstan , specification	2	40	December 18, 2025
2024 & 2025 - Stan the Gathering (weekly Stan meeting) Meetings	7	2409	December 18, 2025
R packages bayesplot v1.15.0 and shinystan v2.7.0 are now on CRAN Announcements bayesplot	2	96	December 18, 2025
Possible Issue with gamma_lccdf Developers	11	375	December 18, 2025
PostDoc Position in Heidelberg Jobs	0	41	December 17, 2025
Advice setting powerscaled priors for longitudinal betabinomial spline model Modeling priors , brms	4	60	December 16, 2025
Induced Dirichlet and constraint transform functions Modeling	3	45	December 16, 2025
How is the sum_to_zero_vector implemented under the hood? Modeling	3	80	December 16, 2025
Continuous approximation of latent negative-binomial stochastic process in epidemic model with beta-binomial observation likelihood Modeling	10	95	December 16, 2025
Dirichlet prior on ordinal regression cutpoints in brms brms	27	3761	December 16, 2025
Performing posterior predictive checks for variational inference models Modeling cmdstanr , gaussian-process , hierarchical-model	1	60	December 15, 2025
Whether to preserve posterior correlations in downstream inference Modeling	8	105	December 15, 2025
Recent paper: Distributional bias compromises leave-one-out cross-validation Modeling loo , cross-validation , model-comparison	1	68	December 15, 2025
Phylogenetic signal in brms brms phylogenetic	8	2093	December 14, 2025
Brmspy: Python-first access to brms (cmdstanr backend, ArviZ output) Interfaces cmdstan , cmdstanr , python , brms	8	386	December 14, 2025
Using cmdstanr without returning the output to R? Interfaces cmdstanr	13	182	December 12, 2025
Why are MAP estimates far from true value in polytomous CDM with latent-class mixture? (Beginner question) Modeling fitting-issues , specification , performance , cmdstanr , hierarchical-model	3	70	December 11, 2025
CmdStan, CmdStanR, CmdStanPy workflow resulting in errors with `as.shinystan` function CmdStan cmdstan , shinystan , cmdstanr , cmdstanpy	6	75	December 11, 2025
Differential Abundance Analysis with a multivariate model? Modeling brms	0	25	December 11, 2025
ONNX Support for Stan General	4	144	December 10, 2025
Multinomial with car(), compare_levels error brms	0	28	December 10, 2025
Multilevel Logit Models with Small Level-2 Sample Size General rstanarm	6	135	December 10, 2025
Funded PhD Position: Computational Modeling of Media Consumption (Chicago) Jobs	0	45	December 9, 2025
New 2025/2026 event for Bayesian Data Analysis Meetup General	0	110	December 9, 2025
Planning the 2.38 release Developers	3	141	December 9, 2025
Generalized Extreme Value distribution Modeling specification	6	184	December 9, 2025

StanCon 2026 registration and abstract submission are now open!

Hi everyone! Registration for StanCon 2026 in Uppsala, Sweden, is now open! You can already register and submit abstracts for contributions. Our first keynote speaker will be announced soon. New this StanCon: In additi…

1

243

December 11, 2025

Welcome to the Stan Forums!

The Stan Forums provide a community for asking and answering questions about all aspects of Stan. Before creating a new topic please search the Forums to see if your questions has already been answered. When posting ne…