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ArviZ (pronounced "AR-vees") is a Python package for exploratory analysis of Bayesian models. It includes functions for posterior analysis, data storage, model checking, comparison and diagnostics.

ArviZ in other languages

ArviZ also has a Julia wrapper available ArviZ.jl.

Documentation

The ArviZ documentation can be found in the official docs. First time users may find the quickstart to be helpful. Additional guidance can be found in the user guide.

Installation

Stable

ArviZ is available for installation from PyPI. The latest stable version can be installed using pip:

pip install arviz

ArviZ is also available through conda-forge.

conda install -c conda-forge arviz

Development

The latest development version can be installed from the main branch using pip:

pip install git+git://github.com/arviz-devs/arviz.git

Another option is to clone the repository and install using git and setuptools:

git clone https://github.com/arviz-devs/arviz.git
cd arviz
python setup.py install

Gallery

<p> <table> <tr> <td> <a href= "https://python.arviz.org/en/latest/examples/plot_forest_ridge.html"> <img alt="Ridge plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_forest_ridge.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_forest.html"> <img alt="Forest Plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_forest.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_violin.html"> <img alt="Violin Plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_violin.png" width="300" height="auto" /> </a> </td> </tr> <tr> <td> <a href="https://python.arviz.org/en/latest/examples/plot_ppc.html"> <img alt="Posterior predictive plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_ppc.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_dot.html"> <img alt="Joint plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_dot.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_posterior.html"> <img alt="Posterior plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_posterior.png" width="300" height="auto" /> </a> </td> </tr> <tr> <td> <a href="https://python.arviz.org/en/latest/examples/plot_density.html"> <img alt="Density plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_density.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_pair.html"> <img alt="Pair plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_pair.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_pair_hex.html"> <img alt="Hexbin Pair plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_pair_hex.png" width="300" height="auto" /> </a> </td> </tr> <tr> <td> <a href="https://python.arviz.org/en/latest/examples/plot_trace.html"> <img alt="Trace plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_trace.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_energy.html"> <img alt="Energy Plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_energy.png" width="300" height="auto" /> </a> </td> <td> <a href="https://python.arviz.org/en/latest/examples/plot_rank.html"> <img alt="Rank Plot" src="https://python.arviz.org/en/latest/_images/mpl_plot_rank.png" width="300" height="auto" /> </a> </td> </tr> </table> <div>

<a href="https://python.arviz.org/en/latest/examples/index.html">And more...</a>

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Dependencies

ArviZ is tested on Python 3.10, 3.11 and 3.12, and depends on NumPy, SciPy, xarray, and Matplotlib.

Citation

If you use ArviZ and want to cite it please use DOI

Here is the citation in BibTeX format

@article{arviz_2019,
  doi = {10.21105/joss.01143},
  url = {https://doi.org/10.21105/joss.01143},
  year = {2019},
  publisher = {The Open Journal},
  volume = {4},
  number = {33},
  pages = {1143},
  author = {Ravin Kumar and Colin Carroll and Ari Hartikainen and Osvaldo Martin},
  title = {ArviZ a unified library for exploratory analysis of Bayesian models in Python},
  journal = {Journal of Open Source Software}
}

Contributions

ArviZ is a community project and welcomes contributions. Additional information can be found in the Contributing Readme

Code of Conduct

ArviZ wishes to maintain a positive community. Additional details can be found in the Code of Conduct

Donations

ArviZ is a non-profit project under NumFOCUS umbrella. If you want to support ArviZ financially, you can donate here.

Sponsors

NumFOCUS