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	482	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	16097	August 26, 2022
Stochastic Vol with Jumps that's smooth and well defined for MCMC Modeling	0	6	February 22, 2026
Question: Diagnostic status used in both interaction and derived predictor — better to use split models? Modeling rstan , fitting-issues , specification , brms	2	71	February 22, 2026
Joint Modeling: Propogating uncertainty into predictors Modeling brms	5	34	February 21, 2026
Posterior prediction terminology (hierarchical model) General posterior-predictive	2	34	February 21, 2026
Stan files for models in PosteriorDB General	1	24	February 21, 2026
Missing signatures for _jacobian and _constrain functions? General language	3	24	February 20, 2026
Design propoal: fold and static events Developers	3	90	February 20, 2026
SAVE THE DATE: The International Conference on Multilevel Analysis in Utrecht, The Netherlands Events	4	227	February 20, 2026
Ornstein–Uhlenbeck correlation structure in brms Modeling rstan , brms	6	123	February 20, 2026
Two-part mixture model on left-censored biomarker data Modeling techniques , fitting-issues , specification , hierarchical-model , brms	12	78	February 19, 2026
How to sample a (singular) covariance matrix under compositional constraint Modeling techniques , specification	14	198	February 19, 2026
Estimate time to run HMC Algorithms fitting-issues	5	39	February 19, 2026
StanCon 2026 Oral presentation deadline (25th of February) Announcements stancon	0	24	February 18, 2026
Model convergence issue Modeling fitting-issues	3	61	February 17, 2026
StanCon 2026 Deadline for oral presentations in ten days (25th of February) Announcements stancon	1	63	February 17, 2026
Announcing the third keynote speaker for StanCon 2026 Announcements stancon	0	90	February 17, 2026
Resources for DSEM General techniques	3	96	February 16, 2026
Cannot install cmdstanr on freshly installed macOS + RStudio CmdStan	2	753	February 13, 2026
Understanding the Likelihood Model for the Cox Family in brms brms survival	4	224	February 13, 2026
Bayesian Causal Networks in R course Events	0	62	February 12, 2026
How can I found the appropriate family to fit my data using brms? brms rstan , brms	1	70	February 11, 2026
Memory usage in model with matrix exponentials Modeling performance	14	279	February 11, 2026
Censoring with unknown boundary: confusion with the manual General	4	85	February 10, 2026
Divergent transitions and low ESS in Bessel Regression using real data Modeling rstan	1	42	February 10, 2026
How to handle log concentration monotonic effects brms	3	56	February 10, 2026
Are stacking weights “leaking” information across folds? Modeling loo , cross-validation , model-comparison	7	137	February 10, 2026
Hilbert-space GP: Rhat inflation and age-specific bias when moving from yearly to monthly birth data Modeling cmdstanr , gaussian-process	5	106	February 9, 2026
Documentation bug in profiling vignette? General cmdstanr	3	68	February 9, 2026