The Stan Forums

Topic	Replies	Views	Activity
StanCon 2026 in Uppsala, Sweden Meetings StanCon 2026 in Uppsala, Sweden We are thrilled to announce that StanCon 2026 will take place in Uppsala, Sweden, from August 17th to August 21st, 2026. The conference brings together researchers and practitioners passi…	1	346	October 14, 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	16030	August 26, 2022
Elpd and weight give very different conclusion Modeling	2	18	December 7, 2025
Multilevel Logit Models with Small Level-2 Sample Size General rstanarm	5	95	December 7, 2025
How to understand the difference between results with flat and informative priors? Modeling fitting-issues , brms	4	68	December 8, 2025
Brmspy: Python-first access to brms (cmdstanr backend, ArviZ output) Interfaces cmdstan , cmdstanr , python , brms	6	279	December 7, 2025
Whether to preserve posterior correlations in downstream inference Modeling	7	37	December 5, 2025
Generalized Extreme Value distribution Modeling specification	5	119	December 6, 2025
Varying highly correlated slopes: between-group variation collapses to zero, poor convergence Modeling hierarchical-model	1	57	December 5, 2025
Advice on modeling the number of goals scored in a handball match Modeling	2	38	December 5, 2025
Estimating difference in effect of a predictor on different (but similar) outcomes in a mutlivariate regression Modeling	5	91	December 6, 2025
Using cmdstanr without returning the output to R? Interfaces cmdstanr	11	103	December 5, 2025
ONNX Support for Stan General	3	85	December 4, 2025
Posterior_linpred for brms brms	7	1248	December 4, 2025
Rtools repeated installation problem General brms	0	24	December 4, 2025
Matrix -> array conversion functions General techniques	1	26	December 3, 2025
Mixis and E_loo General loo	11	137	December 3, 2025
QA/QC on a weird brms model Modeling specification , brms	2	51	December 2, 2025
Qualitatively negligible, but sufficiently strong evidence for indirect effects during mediation analysis in brms Modeling techniques , brms	6	140	December 2, 2025
Parameters that depend on missing values Modeling techniques , fitting-issues , specification , cmdstanr	2	97	December 1, 2025
Informative prior for simplex Modeling	10	202	December 1, 2025
CmdStan, CmdStanR, CmdStanPy workflow resulting in errors with `as.shinystan` function CmdStan cmdstan , shinystan , cmdstanr , cmdstanpy	4	52	December 1, 2025
Divergent transitions and low BFMI in Bessel regression with spatial random effects Modeling	2	66	December 1, 2025
Differences in simplex constraining function vs normal simplex Modeling	18	112	December 1, 2025
RStan performance differences General rstan , compiler	1	80	December 1, 2025
Summary(brmfit) of any fits from brm() gives me errors, but I can still access the fit by just typing fit object General	1	21	December 1, 2025
Issue specifying a custom ordinal family brms specification , brms	0	24	December 1, 2025
Understanding the Likelihood Model for the Cox Family in brms brms survival	3	151	November 30, 2025
Release of CmdStan 2.37.0 Announcements	5	488	November 28, 2025
Do you need to specify offsets (for sampling effort) twice in hurdle models? Modeling brms	9	140	November 27, 2025

StanCon 2026 in Uppsala, Sweden

StanCon 2026 in Uppsala, Sweden We are thrilled to announce that StanCon 2026 will take place in Uppsala, Sweden, from August 17th to August 21st, 2026. The conference brings together researchers and practitioners passi…

1

346

October 14, 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…