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	264	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	16041	August 26, 2022
Soft release of a "tidyverse" style Stan R Package Developers	0	18	December 25, 2025
Hierarchical regression with repeated measures in both x and y AND missing data brms	1	51	December 24, 2025
Is there a way to accelerate this BetaBinomial and DirichletMultinomial model? Modeling rstan , fitting-issues , specification	1	48	December 23, 2025
Advice on Bayes factor analysis (logml could not be estimated within maxiter) General bayes-factor , bridgesampling	1	28	December 23, 2025
Brmspy: Python-first access to brms (cmdstanr backend, ArviZ output) Interfaces cmdstan , cmdstanr , python , brms	9	414	December 23, 2025
Advice setting powerscaled priors for longitudinal betabinomial spline model Modeling priors , brms	10	97	December 22, 2025
Marathon Uppsala weekend before Stancon 2026 General stancon	0	41	December 22, 2025
Announcing StanCon 2026 First Keynote and Program Committee Announcements stancon	0	65	December 22, 2025
Performing posterior predictive checks for variational inference models Modeling cmdstanr , gaussian-process , hierarchical-model	4	118	December 21, 2025
How to choose matrices in an univariate dynamic probit model for online inference (Assumed Density Filter) General	4	45	December 19, 2025
Code optimization & reduce_sum Modeling rstan , specification	2	68	December 18, 2025
2024 & 2025 - Stan the Gathering (weekly Stan meeting) Meetings	7	2429	December 18, 2025
R packages bayesplot v1.15.0 and shinystan v2.7.0 are now on CRAN Announcements bayesplot	2	112	December 18, 2025
Possible Issue with gamma_lccdf Developers	11	386	December 18, 2025
PostDoc Position in Heidelberg Jobs	0	56	December 17, 2025
Induced Dirichlet and constraint transform functions Modeling	3	54	December 16, 2025
How is the sum_to_zero_vector implemented under the hood? Modeling	3	96	December 16, 2025
Continuous approximation of latent negative-binomial stochastic process in epidemic model with beta-binomial observation likelihood Modeling	10	105	December 16, 2025
Dirichlet prior on ordinal regression cutpoints in brms brms	27	3773	December 16, 2025
Whether to preserve posterior correlations in downstream inference Modeling	8	113	December 15, 2025
Recent paper: Distributional bias compromises leave-one-out cross-validation Modeling loo , cross-validation , model-comparison	1	90	December 15, 2025
Phylogenetic signal in brms brms phylogenetic	8	2100	December 14, 2025
Using cmdstanr without returning the output to R? Interfaces cmdstanr	13	190	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	73	December 11, 2025
CmdStan, CmdStanR, CmdStanPy workflow resulting in errors with `as.shinystan` function CmdStan cmdstan , shinystan , cmdstanr , cmdstanpy	6	79	December 11, 2025
Differential Abundance Analysis with a multivariate model? Modeling brms	0	29	December 11, 2025
ONNX Support for Stan General	4	149	December 10, 2025
Multinomial with car(), compare_levels error brms	0	32	December 10, 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

264

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…