greta

Spec sheet

Purpose

greta lets users write statistical models in R and fit them by MCMC.Read 11 Oct 2026 · greta-dev.github.io

Deployment

desktopRead 23 Sep 2026 · greta-dev.github.io

Free plan

YesRead 23 Sep 2026 · greta-dev.github.io

Support

The maker directs usage and model questions to the greta forum rather than GitHub issues.Read 11 Oct 2026 · greta-dev.github.io

License

The CRAN package listing identifies greta's license as Apache License 2.0.Read 11 Oct 2026 · cran.mirror.garr.it

Alternative dependency setup

The maker documents using a conda environment when needed, including for offline use or pinned versions.Read 11 Oct 2026 · greta-dev.github.io

Analysis types

The documentation describes Bayesian analyses with priors and frequentist inference using variables without probability distributions.Read 11 Oct 2026 · greta-dev.github.io

Bayesian analysis

YesRead 23 Sep 2026 · greta-dev.github.io

Bayesian and frequentist modeling

greta supports Bayesian analyses with prior distributions and frequentist inference using variables without probability distributions.Read 11 Oct 2026 · greta-dev.github.io

Compute

The maker says greta can run on CPU clusters and GPUs.Read 11 Oct 2026 · greta-dev.github.io

Data import formats

R numeric/logical vectors, matrices, arrays, and numeric/logical data framesRead 23 Sep 2026 · greta-dev.github.io

Dependencies

greta uses Google's TensorFlow and TensorFlow Probability Python packages, which it usually installs automatically on first use via uv.Read 11 Oct 2026 · greta-dev.github.io

Dependency setup

On first use, greta usually installs a compatible Python, TensorFlow, and TensorFlow Probability through uv automatically.Read 11 Oct 2026 · greta-dev.github.io

Developers

The site credits Nick Golding and Nicholas Tierney as developers.Read 11 Oct 2026 · greta-dev.github.io

Extensibility

Users can write their own R functions and packages using greta.Read 11 Oct 2026 · greta-dev.github.io

Inference

greta builds statistical models interactively in R and samples from them using MCMC.Read 11 Oct 2026 · greta-dev.github.io

Installation

The stable package is available from CRAN, and development versions are available through r-universe and GitHub.Read 11 Oct 2026 · greta-dev.github.io

Model visualization

greta provides a plotting function to visualize and check models before sampling.Read 11 Oct 2026 · greta-dev.github.io

Modeling

greta models are written in R, so users do not need to learn another language such as BUGS or Stan.Read 11 Oct 2026 · greta-dev.github.io

Optional plotting dependency

DiagrammeR is not installed automatically, and users need it with igraph to plot greta models.Read 11 Oct 2026 · greta-dev.github.io

Plotting limitation

If users cannot install igraph and DiagrammeR, they can still use greta except for plotting models.Read 11 Oct 2026 · greta-dev.github.io

Plotting requirement

Model plotting depends on DiagrammeR, which is not installed automatically with greta.Read 11 Oct 2026 · greta-dev.github.io

R workflow

Models are written interactively in R, where greta arrays can be combined with mathematical operators and functions.Read 11 Oct 2026 · greta-dev.github.io

Regression models

YesRead 23 Sep 2026 · greta-dev.github.io

Scripting support

YesRead 23 Sep 2026 · greta-dev.github.io

TensorFlow engine

greta uses Google TensorFlow and TensorFlow Probability Python packages under the hood.Read 11 Oct 2026 · greta-dev.github.io

Where Specifiction places it

• Statistical Analysis Software#59 of 1067.6