A curated collection of tools and interfaces to help you work effectively with Stan across various programming environments and stages of your modeling workflow.

This is the official documentation for Stan. The Stan User’s Guide (pdf) provides example models and programming techniques for coding statistical models in Stan. The Stan Reference Manual (pdf) specifies the Stan programming language and inference algorithms.

Multi-Language, Cross-Platform Toolkit Interfaces for Python, Julia, R, and the Unix shell make it easy to use Stan in any programming environment, on laptops, clusters, or in the cloud. A rich ecosystem of tools for validation and visualization support decision-making and communication.

Stan version information, ideally including the core Stan version, and version of the Stan interface. Your compute environment: operating system and C++ compiler.

A community to discuss Stan and Bayesian modeling.

Jan 22, 2025 · I just wanted to point people to this super useful notebook and gist from Ricardo Vieira, one of the PyMC developers, who outlined the relation between how PyMC and Stan specify models, including a lot of tricks for getting Stan-like flexibility into the graphical-modeling-centric world of PyMC.

Stan allows compound arithmetic and assignment statements of the forms listed in the table. The compound form is legal whenever the corresponding long form would be legal and it has the same effect.

Compared to the Kim et al. formulation, the Stan model adds priors for the parameters ϕ, σ, and μ. The shock terms ϵ t and δ t do not appear explicitly in the model, although they could be calculated efficiently in a generated quantities block.

Sep 25, 2024 · There’s a description in the User’s Guide chapter on regression of how to code it in Stan. We should really introduce Cholesky-parameterized inverse Wisharts but we don’t use them a lot ourselves given @bgoodri ’s paper linked above.

Stan is used in most of our interfaces through the Stan compiler stanc. Since version 2.22, the Stan compiler has been implemented in OCaml and is referred to as stanc3.