Monthly Downloads: 245
Programming language: Jupyter Notebook
License: BSD 3-clause "New" or "Revised" License
Tags: Development     Ihaskell    
Latest version: v0.10.0.0
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Contains the hvega module for creating Vega-Lite visualizations in Haskell, and the ihaskell-hvega module for viewing these visualizations in IHaskell notebooks.

This code is released under the BSD3 license.

The hvega package started of as an almost-direct copy of version 2.2.1 of the Elm Vega library, which was released under a BSD3 license by Jo Wood of the giCentre at the City University of London. The two have diverged somewhat since (mainly that hvega still uses data types as its primary control structure whilst the Elm version has moved to functions).


The packages are available on hackage:

There is a top-level stack.yaml which builds both hvega and ihaskell-hvega using Stack. There is also a shell.nix file for development with Nix. At the present time (Devember 2019) I don't make any guarantees about either method (in particular for ihaskell-vega).


There is basic testing of the output of hvega, and the module also contains a tutorial which contains plots you can view; e.g. with Vega View or Vega-Desktop.

The notebooks/ directory contains a (very small, very random) sample of notebooks experimenting with hvega. I recommend using Tweag I/O's jupyterWith environment to view these. At present there is support for Jupyter notebook, whereas the support for Jupyter lab is unfortunately limited (due to limitations on the current IHaskell environment and differences between the Jupyter Lab versions).

There is also a Data Haskell example notebook, and the Monad-Bayes blog series by tweag.io which starts here.


I created this as a piece of procrastination, while procrastinating with a different task. At present I am not using it, due to lack of time. Please pop on over to GitHub, or ping me on Twitter @doug_burke if you would like to help.

*Note that all licence references and agreements mentioned in the ihaskell-hvega README section above are relevant to that project's source code only.