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	440	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	16082	August 26, 2022
Parallelization within chain and between nodes? General	8	133	February 5, 2026
Possible Issue with gamma_lccdf Developers	16	521	February 5, 2026
How to sample a (singular) covariance matrix under compositional constraint Modeling techniques , specification	8	67	February 5, 2026
Inconsistent posteriors when changing number of threads (map_rect) Modeling	15	1202	February 5, 2026
Two-part mixture model on left-censored biomarker data Modeling techniques , fitting-issues , specification , hierarchical-model , brms	0	4	February 5, 2026
Hilbert-space GP: Rhat inflation and age-specific bias when moving from yearly to monthly birth data Modeling cmdstanr , gaussian-process	0	8	February 5, 2026
Projpred - model with horseshoe prior does not converge brms	13	1044	February 5, 2026
Censoring with unknown boundary: confusion with the manual General	1	18	February 5, 2026
Are stacking weights “leaking” information across folds? Modeling loo , cross-validation , model-comparison	3	52	February 5, 2026
Modeling noisy indicator of a ratio Modeling specification	4	84	February 5, 2026
Doing SBC on restricted gamma distribution Modeling	4	29	February 4, 2026
Mechanistic model with stochastic forcing Modeling rstan	1	60	February 4, 2026
Do I need a Jacobian to sample from a transfomed unit vector? Modeling	2	70	February 4, 2026
Exact, approximate, and minimum count data Modeling techniques , specification	4	107	February 4, 2026
Proof of concept: Binary output format for cmdstan Developers	48	465	February 4, 2026
Implementing projection predictive feature selection for custom model with `projpred` General projpred	5	52	February 4, 2026
Ornstein–Uhlenbeck correlation structure in brms Modeling rstan , brms	0	35	February 3, 2026
Problem in multilevel (hierarchical) multinomial logistic regression (with brms) Modeling brms	11	412	February 3, 2026
Multivariate probit occupancy models Modeling	6	80	February 2, 2026
'cmath' file not found running brms models on Windows Interfaces fitting-issues	1	113	February 1, 2026
Call for Contributors: Bringing Probabilistic Models & Inference to ONNX Project Proposals	0	40	January 31, 2026
Power analysis for ordinal phylogenetic model brms techniques , brms	1	43	January 31, 2026
Vector Autoregressive Structure brms techniques , brms	3	114	January 31, 2026
Error when loading premade priors brms brms	0	18	January 30, 2026
Stan Governing Body news Stan Governance	0	71	January 29, 2026
How to specify weakly informative priors for beta regression with 10 predictors? General techniques , specification	16	227	January 29, 2026
Generating parameter values for a new level in multivariate model with group correlations Modeling techniques , brms	1	44	January 29, 2026
Using the wiener_lpdf() function in the cmdstanr package to implement a diffusion model, the construction of a Markov chain was unsuccessful CmdStan	28	895	January 29, 2026

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

440

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…