[](https://elpigraph-python.readthedocs.io/en/latest/?badge=latest)
[](https://github.com/j-bac/elpigraph-python/blob/master/LICENSE)
[](https://doi.org/10.3390/e22030296)
Description
===========
This package provides a Python implementation of the ElPiGraph algorithm with cpu and gpu support. Usage is explained in the [documentation](https://elpigraph-python.readthedocs.io/en/latest/) and a
self-contained description of the algorithm is available
[here](https://github.com/auranic/Elastic-principal-graphs/blob/master/ElPiGraph_Methods.pdf)
or in the [paper](https://www.mdpi.com/1099-4300/22/3/296)
It replicates the [R implementation](https://github.com/j-bac/ElPiGraph.R),
coded by [Luca Albergante](https://github.com/Albluca) and should return exactly the same results. Please open an issue if you do notice different output. Differences between the two versions are detailed in [differences.md](differences.md). This package extends initial work by [Louis Faure](https://github.com/LouisFaure/ElPiGraph.P) and [Alexis Martin](https://github.com/AlexiMartin/ElPiGraph.P).
A native MATLAB implementation of the algorithm (coded by [Andrei
Zinovyev](https://github.com/auranic/) and [Evgeny
Mirkes](https://github.com/Mirkes)) is also
[available](https://github.com/auranic/Elastic-principal-graphs)
Requirements
============
Requirements are listed in requirements.txt. In addition, to enable gpu support cupy is needed:
https://docs-cupy.chainer.org/en/stable/install.html
Installation
====================
```bash
git clone https://github.com/j-bac/elpigraph-python.git
cd elpigraph
pip install .
```
or
```bash
pip install elpigraph-python
```
Citation
========
When using this package, please cite our [paper](https://www.mdpi.com/1099-4300/22/3/296):
Albergante, L. et al . Robust and Scalable Learning of Complex Intrinsic Dataset Geometry via ElPiGraph (2020)
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