IRIS-HEP Fellow: Jerry Ling



Fellowship dates: Jun – Sep, 2022

Home Institution: Harvard University


Project: Reading (and possibly writing) RNTuples in Uproot

[Uproot](https://github.com/scikit-hep/uproot5#readme) is a Python library that reads and writes ROOT files, the file format for nearly all particle physics data. RNTuple is a new, fully columnar data format for ROOT, which is intended as the eventual replacement for TTree ([paper](https://arxiv.org/abs/2003.07669), [plans](https://indico.jlab.org/event/420/contributions/7701/), and [spec](https://github.com/root-project/root/blob/a483a2bc75552301e3347c56898df07b95fe45f9/tree/ntuple/v7/doc/specifications.md). Thanks to its columnar structure, data structures of any complexity can be zero-copy converted (apart from decompression) into [Awkward Arrays](https://github.com/scikit-hep/awkward#readme). In this project, the successful candidate would develop the interface code in Uproot to read RNTuple data into Awkward Arrays. If time permits, the candidate may attempt to implement RNTuple-writing and RNTuple reading in sister projects in Julia-lang as well.

More information: My project proposal

Mentors:

  • Jim Pivarski - (Princeton)

Presentations and Publications
Current Status
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