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[//]: # (Logo:)
<div align="center">
PySR searches for symbolic expressions which optimize a particular objective.
https://github.com/MilesCranmer/PySR/assets/7593028/c8511a49-b408-488f-8f18-b1749078268f
# PySR: High-Performance Symbolic Regression in Python and Julia
| **Docs** | **Forums** | **Paper** | **colab demo** |
|:---:|:---:|:---:|:---:|
|[](https://astroautomata.com/PySR/)|[](https://github.com/MilesCranmer/PySR/discussions)|[](https://arxiv.org/abs/2305.01582)|[](https://colab.research.google.com/github/MilesCranmer/PySR/blob/master/examples/pysr_demo.ipynb)|
| **pip** | **conda** | **Stats** |
| :---: | :---: | :---: |
|[](https://badge.fury.io/py/pysr)|[](https://anaconda.org/conda-forge/pysr)|<div align="center">pip: [](https://pypi.org/project/pysr/)<br>conda: [](https://anaconda.org/conda-forge/pysr)</div>|
</div>
If you find PySR useful, please cite the paper [arXiv:2305.01582](https://arxiv.org/abs/2305.01582).
If you've finished a project with PySR, please submit a PR to showcase your work on the [research showcase page](https://astroautomata.com/PySR/papers)!
**Contents**:
- [Why PySR?](#why-pysr)
- [Installation](#installation)
- [Quickstart](#quickstart)
- [→ Documentation](https://astroautomata.com/PySR)
- [Contributors](#contributors-)
<div align="center">
### Test status
| **Linux** | **Windows** | **macOS** |
|---|---|---|
|[](https://github.com/MilesCranmer/PySR/actions/workflows/CI.yml)|[](https://github.com/MilesCranmer/PySR/actions/workflows/CI_Windows.yml)|[](https://github.com/MilesCranmer/PySR/actions/workflows/CI_mac.yml)|
| **Docker** | **Conda** | **Coverage** |
|[](https://github.com/MilesCranmer/PySR/actions/workflows/CI_docker.yml)|[](https://github.com/MilesCranmer/PySR/actions/workflows/CI_conda_forge.yml)|[](https://coveralls.io/github/MilesCranmer/PySR)|
</div>
## Why PySR?
PySR is an open-source tool for *Symbolic Regression*: a machine learning
task where the goal is to find an interpretable symbolic expression that optimizes some objective.
Over a period of several years, PySR has been engineered from the ground up
to be (1) as high-performance as possible,
(2) as configurable as possible, and (3) easy to use.
PySR is developed alongside the Julia library [SymbolicRegression.jl](https://github.com/MilesCranmer/SymbolicRegression.jl),
which forms the powerful search engine of PySR.
The details of these algorithms are described in the [PySR paper](https://arxiv.org/abs/2305.01582).
Symbolic regression works best on low-dimensional datasets, but
one can also extend these approaches to higher-dimensional
spaces by using "*Symbolic Distillation*" of Neural Networks, as explained in
[2006.11287](https://arxiv.org/abs/2006.11287), where we apply
it to N-body problems. Here, one essentially uses
symbolic regression to convert a neural net
to an analytic equation. Thus, these tools simultaneously present
an explicit and powerful way to interpret deep neural networks.
## Installation
### Pip
You can install PySR with pip:
```bash
pip install pysr
```
Julia dependencies will be installed at first import.
### Conda
Similarly, with conda:
```bash
conda install -c conda-forge pysr
```
### Docker
You can also use the `Dockerfile` to install PySR in a docker container
1. Clone this repo.
2. Within the repo's directory, build the docker container:
```bash
docker build -t pysr .
```
3. You can then start the container with an IPython execution with:
```bash
docker run -it --rm pysr ipython
```
For more details, see the [docker section](#docker).
---
### Troubleshooting
One issue you might run into can result in a hard crash at import with
a message like "`GLIBCXX_...` not found". This is due to another one of the Python dependencies
loading an incorrect `libstdc++` library. To fix this, you should modify your
`LD_LIBRARY_PATH` variable to reference the Julia libraries. For example, if the Julia
version of `libstdc++.so` is located in `$HOME/.julia/juliaup/julia-1.10.0+0.x64.linux.gnu/lib/julia/`
(which likely differs on your system!), you could add:
```
export LD_LIBRARY_PATH=$HOME/.julia/juliaup/julia-1.10.0+0.x64.linux.gnu/lib/julia/:$LD_LIBRARY_PATH
```
to your `.bashrc` or `.zshrc` file.
## Quickstart
You might wish to try the interactive tutorial [here](https://colab.research.google.com/github/MilesCranmer/PySR/blob/master/examples/pysr_demo.ipynb), which uses the notebook in `examples/pysr_demo.ipynb`.
In practice, I highly recommend using IPython rather than Jupyter, as the printing is much nicer.
Below is a quick demo here which you can paste into a Python runtime.
First, let's import numpy to generate some test data:
```python
import numpy as np
X = 2 * np.random.randn(100, 5)
y = 2.5382 * np.cos(X[:, 3]) + X[:, 0] ** 2 - 0.5
```
We have created a dataset with 100 datapoints, with 5 features each.
The relation we wish to model is $2.5382 \cos(x_3) + x_0^2 - 0.5$.
Now, let's create a PySR model and train it.
PySR's main interface is in the style of scikit-learn:
```python
from pysr import PySRRegressor
model = PySRRegressor(
niterations=40, # < Increase me for better results
binary_operators=["+", "*"],
unary_operators=[
"cos",
"exp",
"sin",
"inv(x) = 1/x",
# ^ Custom operator (julia syntax)
],
extra_sympy_mappings={"inv": lambda x: 1 / x},
# ^ Define operator for SymPy as well
elementwise_loss="loss(prediction, target) = (prediction - target)^2",
# ^ Custom loss function (julia syntax)
)
```
This will set up the model for 40 iterations of the search code, which contains hundreds of thousands of mutations and equation evaluations.
Let's train this model on our dataset:
```python
model.fit(X, y)
```
Internally, this launches a Julia process which will do a multithreaded search for equations to fit the dataset.
Equations will be printed during training, and once you are satisfied, you may
quit early by hitting 'q' and then \<enter\>.
After the model has been fit, you can run `model.predict(X)`
to see the predictions on a given dataset using the automatically-selected expression,
or, for example, `model.predict(X, 3)` to see the predictions of the 3rd equation.
You may run:
```python
print(model)
```
to print the learned equations:
```python
PySRRegressor.equations_ = [
pick score equation loss complexity
0 0.000000 4.4324794 42.354317 1
1 1.255691 (x0 * x0) 3.437307 3
2 0.011629 ((x0 * x0) + -0.28087974) 3.358285 5
3 0.897855 ((x0 * x0) + cos(x3)) 1.368308 6
4 0.857018 ((x0 * x0) + (cos(x3) * 2.4566472)) 0.246483 8
5 >>>> inf (((cos(x3) + -0.19699033) * 2.5382123) + (x0 *... 0.000000 10
]
```
This arrow in the `pick` column indicates which equation is currently selected by your
`model_selection` strategy for prediction.
(You may change `model_selection` after `.fit(X, y)` as well.)
`model.equations_` is a pandas DataFrame containing all equations, including callable format
(`lambda_format`),
SymPy format (`sympy_format` - which you can also get with `model.sympy()`), and even JAX and PyTorch format
(both of which are differentiable - which you can get with `model.jax()` and `model.pytorch()`).
Note that `PySRRegressor` stores the state of the last search, and will restart from where you left off the next time you call `.fit()`, assuming you have set `warm_start=True`.
This will cause problems if significant changes are made to the search parameters (like changing the operators). You can run `model.reset()` to reset the state.
You will notice that PySR will save two files:
`hall_of_fame...csv` and `hall_of_fame...pkl`.
The csv file is a list of equations and their losses, and the pkl file is a saved state of the model.
You may load the model from the `pkl` file with:
```python
model = PySRRegressor.from_file("hall_of_fame.2022-08-10_100832.281.pkl")
```
There are several other useful features such as denoising (e.g., `denoise=True`),
feature selection (e.g., `select_k_features=3`).
For examples of these and other features, see the [examples page](https://astroautomata.com/PySR/examples).
For a detailed look at more options, see the [options page](https://astroautomata.com/PySR/options).
You can also see the full API at [this page](https://astroautomata.com/PySR/api).
There are also tips for tuning PySR on [this page](https://astroautomata.com/PySR/tuning).
### Detailed Example
The following code makes use of as many PySR features as possible.
Note that is just a demonstration of features and you should not use this example as-is.
For details on what each parameter does, check out the [API page](https://astroautomata.com/PySR/api/).
```python
model = PySRRegressor(
procs=4,
populations=8,
# ^ 2 populations per core, so one is always running.
population_size=50,
# ^ Slightly larger populations, for greater diversity.
ncycles_per_iteration=500,
# ^ Generations between migrations.
niterations=10000000, # Run forever
early_stop_condition=(
"stop_if(loss, complexity) = loss < 1e-6 && complexity < 10"
# Stop early if we find a good and simple equation
),
timeout_in_seconds=60 * 60 * 24,
# ^ Alternatively, stop after 24 hours have passed.
maxsize=50,
# ^ Allow greater complexity.
maxdepth=10,
# ^ But, avoid deep nesting.
binary_operators=["*", "+", "-", "/"],
unary_operators=["square", "cube", "exp", "cos2(x)=cos(x)^2"],
constraints={
"/": (-1, 9),
"square": 9,
"cube": 9,
"exp": 9,
},
# ^ Limit the complexity within each argument.
# "inv": (-1, 9) states that the numerator has no constraint,
# but the denominator has a max complexity of 9.
# "exp": 9 simply states that `exp` can only have
# an expression of complexity 9 as input.
nested_constraints={
"square": {"square": 1, "cube": 1, "exp": 0},
"cube": {"square": 1, "cube": 1, "exp": 0},
"exp": {"square": 1, "cube": 1, "exp": 0},
},
# ^ Nesting constraints on operators. For example,
# "square(exp(x))" is not allowed, since "square": {"exp": 0}.
complexity_of_operators={"/": 2, "exp": 3},
# ^ Custom complexity of particular operators.
complexity_of_constants=2,
# ^ Punish constants more than variables
select_k_features=4,
# ^ Train on only the 4 most important features
progress=True,
# ^ Can set to false if printing to a file.
weight_randomize=0.1,
# ^ Randomize the tree much more frequently
cluster_manager=None,
# ^ Can be set to, e.g., "slurm", to run a slurm
# cluster. Just launch one script from the head node.
precision=64,
# ^ Higher precision calculations.
warm_start=True,
# ^ Start from where left off.
turbo=True,
# ^ Faster evaluation (experimental)
julia_project=None,
# ^ Can set to the path of a folder containing the
# "SymbolicRegression.jl" repo, for custom modifications.
update=False,
# ^ Don't update Julia packages
extra_sympy_mappings={"cos2": lambda x: sympy.cos(x)**2},
# extra_torch_mappings={sympy.cos: torch.cos},
# ^ Not needed as cos already defined, but this
# is how you define custom torch operators.
# extra_jax_mappings={sympy.cos: "jnp.cos"},
# ^ For JAX, one passes a string.
)
```
### Docker
You can also test out PySR in Docker, without
installing it locally, by running the following command in
the root directory of this repo:
```bash
docker build -t pysr .
```
This builds an image called `pysr` for your system's architecture,
which also contains IPython.
You can then run this with:
```bash
docker run -it --rm -v "$PWD:/data" pysr ipython
```
which will link the current directory to the container's `/data` directory
and then launch ipython.
If you have issues building for your system's architecture,
you can emulate another architecture by including `--platform linux/amd64`,
before the `build` and `run` commands.
<div align="center">
### Contributors ✨
</div>
We are eager to welcome new contributors! Check out our contributors [guide](https://github.com/MilesCranmer/PySR/blob/master/CONTRIBUTORS.md) for tips 🚀.
If you have an idea for a new feature, don't hesitate to share it on the [issues](https://github.com/MilesCranmer/PySR/issues) or [discussions](https://github.com/MilesCranmer/PySR/discussions) page.
<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
<!-- prettier-ignore-start -->
<!-- markdownlint-disable -->
<table>
<tbody>
<tr>
<td align="center" valign="top" width="12.5%"><a href="https://www.linkedin.com/in/markkittisopikul/"><img src="https://avatars.githubusercontent.com/u/8062771?v=4?s=50" width="50px;" alt="Mark Kittisopikul"/><br /><sub><b>Mark Kittisopikul</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=mkitti" title="Code">💻</a> <a href="#ideas-mkitti" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-mkitti" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#platform-mkitti" title="Packaging/porting to new platform">📦</a> <a href="#promotion-mkitti" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Amkitti" title="Reviewed Pull Requests">👀</a> <a href="#tool-mkitti" title="Tools">🔧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=mkitti" title="Tests">⚠️</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/tttc3"><img src="https://avatars.githubusercontent.com/u/97948946?v=4?s=50" width="50px;" alt="T Coxon"/><br /><sub><b>T Coxon</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Atttc3" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=tttc3" title="Code">💻</a> <a href="#plugin-tttc3" title="Plugin/utility libraries">🔌</a> <a href="#ideas-tttc3" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-tttc3" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#maintenance-tttc3" title="Maintenance">🚧</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Atttc3" title="Reviewed Pull Requests">👀</a> <a href="#tool-tttc3" title="Tools">🔧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=tttc3" title="Tests">⚠️</a> <a href="#userTesting-tttc3" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/DhananjayAshok"><img src="https://avatars.githubusercontent.com/u/46792537?v=4?s=50" width="50px;" alt="Dhananjay Ashok"/><br /><sub><b>Dhananjay Ashok</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=DhananjayAshok" title="Code">💻</a> <a href="#example-DhananjayAshok" title="Examples.">🌍</a> <a href="#ideas-DhananjayAshok" title="Ideas, planning, and feedback.">💡</a> <a href="#maintenance-DhananjayAshok" title="Maintenance">🚧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=DhananjayAshok" title="Tests">⚠️</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://gitlab.com/johanbluecreek"><img src="https://avatars.githubusercontent.com/u/852554?v=4?s=50" width="50px;" alt="Johan Blåbäck"/><br /><sub><b>Johan Blåbäck</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Ajohanbluecreek" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=johanbluecreek" title="Code">💻</a> <a href="#ideas-johanbluecreek" title="Ideas, planning, and feedback.">💡</a> <a href="#maintenance-johanbluecreek" title="Maintenance">🚧</a> <a href="#promotion-johanbluecreek" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Ajohanbluecreek" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=johanbluecreek" title="Tests">⚠️</a> <a href="#userTesting-johanbluecreek" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://mathopt.de/people/martensen/index.php"><img src="https://avatars.githubusercontent.com/u/20998300?v=4?s=50" width="50px;" alt="JuliusMartensen"/><br /><sub><b>JuliusMartensen</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3AAlCap23" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=AlCap23" title="Code">💻</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=AlCap23" title="Documentation">📖</a> <a href="#plugin-AlCap23" title="Plugin/utility libraries">🔌</a> <a href="#ideas-AlCap23" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-AlCap23" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#maintenance-AlCap23" title="Maintenance">🚧</a> <a href="#platform-AlCap23" title="Packaging/porting to new platform">📦</a> <a href="#promotion-AlCap23" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3AAlCap23" title="Reviewed Pull Requests">👀</a> <a href="#tool-AlCap23" title="Tools">🔧</a> <a href="#userTesting-AlCap23" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/ngam"><img src="https://avatars.githubusercontent.com/u/67342040?v=4?s=50" width="50px;" alt="ngam"/><br /><sub><b>ngam</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=ngam" title="Code">💻</a> <a href="#infra-ngam" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#platform-ngam" title="Packaging/porting to new platform">📦</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Angam" title="Reviewed Pull Requests">👀</a> <a href="#tool-ngam" title="Tools">🔧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=ngam" title="Tests">⚠️</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://cjdoris.github.io/"><img src="https://avatars.githubusercontent.com/u/1844215?v=4?s=50" width="50px;" alt="Christopher Rowley"/><br /><sub><b>Christopher Rowley</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=cjdoris" title="Code">💻</a> <a href="#ideas-cjdoris" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-cjdoris" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#platform-cjdoris" title="Packaging/porting to new platform">📦</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Acjdoris" title="Reviewed Pull Requests">👀</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/kazewong"><img src="https://avatars.githubusercontent.com/u/8803931?v=4?s=50" width="50px;" alt="Kaze Wong"/><br /><sub><b>Kaze Wong</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Akazewong" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=kazewong" title="Code">💻</a> <a href="#ideas-kazewong" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-kazewong" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#maintenance-kazewong" title="Maintenance">🚧</a> <a href="#promotion-kazewong" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Akazewong" title="Reviewed Pull Requests">👀</a> <a href="#research-kazewong" title="Research">🔬</a> <a href="#userTesting-kazewong" title="User Testing">📓</a></td>
</tr>
<tr>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/ChrisRackauckas"><img src="https://avatars.githubusercontent.com/u/1814174?v=4?s=50" width="50px;" alt="Christopher Rackauckas"/><br /><sub><b>Christopher Rackauckas</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3AChrisRackauckas" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=ChrisRackauckas" title="Code">💻</a> <a href="#plugin-ChrisRackauckas" title="Plugin/utility libraries">🔌</a> <a href="#ideas-ChrisRackauckas" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-ChrisRackauckas" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#promotion-ChrisRackauckas" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3AChrisRackauckas" title="Reviewed Pull Requests">👀</a> <a href="#research-ChrisRackauckas" title="Research">🔬</a> <a href="#tool-ChrisRackauckas" title="Tools">🔧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=ChrisRackauckas" title="Tests">⚠️</a> <a href="#userTesting-ChrisRackauckas" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://kidger.site/"><img src="https://avatars.githubusercontent.com/u/33688385?v=4?s=50" width="50px;" alt="Patrick Kidger"/><br /><sub><b>Patrick Kidger</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Apatrick-kidger" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=patrick-kidger" title="Code">💻</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=patrick-kidger" title="Documentation">📖</a> <a href="#plugin-patrick-kidger" title="Plugin/utility libraries">🔌</a> <a href="#ideas-patrick-kidger" title="Ideas, planning, and feedback.">💡</a> <a href="#maintenance-patrick-kidger" title="Maintenance">🚧</a> <a href="#promotion-patrick-kidger" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Apatrick-kidger" title="Reviewed Pull Requests">👀</a> <a href="#research-patrick-kidger" title="Research">🔬</a> <a href="#tool-patrick-kidger" title="Tools">🔧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=patrick-kidger" title="Tests">⚠️</a> <a href="#userTesting-patrick-kidger" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/OkonSamuel"><img src="https://avatars.githubusercontent.com/u/39421418?v=4?s=50" width="50px;" alt="Okon Samuel"/><br /><sub><b>Okon Samuel</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3AOkonSamuel" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=OkonSamuel" title="Code">💻</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=OkonSamuel" title="Documentation">📖</a> <a href="#maintenance-OkonSamuel" title="Maintenance">🚧</a> <a href="#ideas-OkonSamuel" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-OkonSamuel" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3AOkonSamuel" title="Reviewed Pull Requests">👀</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=OkonSamuel" title="Tests">⚠️</a> <a href="#userTesting-OkonSamuel" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/w2ll2am"><img src="https://avatars.githubusercontent.com/u/16038228?v=4?s=50" width="50px;" alt="William Booth-Clibborn"/><br /><sub><b>William Booth-Clibborn</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=w2ll2am" title="Code">💻</a> <a href="#example-w2ll2am" title="Examples.">🌍</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=w2ll2am" title="Documentation">📖</a> <a href="#userTesting-w2ll2am" title="User Testing">📓</a> <a href="#maintenance-w2ll2am" title="Maintenance">🚧</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Aw2ll2am" title="Reviewed Pull Requests">👀</a> <a href="#tool-w2ll2am" title="Tools">🔧</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=w2ll2am" title="Tests">⚠️</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://pablo-lemos.github.io/"><img src="https://avatars.githubusercontent.com/u/38078898?v=4?s=50" width="50px;" alt="Pablo Lemos"/><br /><sub><b>Pablo Lemos</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3APablo-Lemos" title="Bug reports">🐛</a> <a href="#ideas-Pablo-Lemos" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-Pablo-Lemos" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3APablo-Lemos" title="Reviewed Pull Requests">👀</a> <a href="#research-Pablo-Lemos" title="Research">🔬</a> <a href="#userTesting-Pablo-Lemos" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/Moelf"><img src="https://avatars.githubusercontent.com/u/5306213?v=4?s=50" width="50px;" alt="Jerry Ling"/><br /><sub><b>Jerry Ling</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3AMoelf" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=Moelf" title="Code">💻</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=Moelf" title="Documentation">📖</a> <a href="#example-Moelf" title="Examples.">🌍</a> <a href="#ideas-Moelf" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-Moelf" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3AMoelf" title="Reviewed Pull Requests">👀</a> <a href="#userTesting-Moelf" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/CharFox1"><img src="https://avatars.githubusercontent.com/u/35052672?v=4?s=50" width="50px;" alt="Charles Fox"/><br /><sub><b>Charles Fox</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3ACharFox1" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=CharFox1" title="Code">💻</a> <a href="#ideas-CharFox1" title="Ideas, planning, and feedback.">💡</a> <a href="#maintenance-CharFox1" title="Maintenance">🚧</a> <a href="#promotion-CharFox1" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3ACharFox1" title="Reviewed Pull Requests">👀</a> <a href="#research-CharFox1" title="Research">🔬</a> <a href="#userTesting-CharFox1" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/johannbrehmer"><img src="https://avatars.githubusercontent.com/u/17068560?v=4?s=50" width="50px;" alt="Johann Brehmer"/><br /><sub><b>Johann Brehmer</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=johannbrehmer" title="Code">💻</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=johannbrehmer" title="Documentation">📖</a> <a href="#ideas-johannbrehmer" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-johannbrehmer" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Ajohannbrehmer" title="Reviewed Pull Requests">👀</a> <a href="#research-johannbrehmer" title="Research">🔬</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=johannbrehmer" title="Tests">⚠️</a> <a href="#userTesting-johannbrehmer" title="User Testing">📓</a></td>
</tr>
<tr>
<td align="center" valign="top" width="12.5%"><a href="http://www.cosmicmar.com/"><img src="https://avatars.githubusercontent.com/u/1510968?v=4?s=50" width="50px;" alt="Marius Millea"/><br /><sub><b>Marius Millea</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=marius311" title="Code">💻</a> <a href="#ideas-marius311" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-marius311" title="Promotion">📣</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Amarius311" title="Reviewed Pull Requests">👀</a> <a href="#userTesting-marius311" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://gitlab.com/cobac"><img src="https://avatars.githubusercontent.com/u/27872944?v=4?s=50" width="50px;" alt="Coba"/><br /><sub><b>Coba</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Acobac" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=cobac" title="Code">💻</a> <a href="#ideas-cobac" title="Ideas, planning, and feedback.">💡</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Acobac" title="Reviewed Pull Requests">👀</a> <a href="#userTesting-cobac" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/foxtran"><img src="https://avatars.githubusercontent.com/u/39676482?v=4?s=50" width="50px;" alt="foxtran"/><br /><sub><b>foxtran</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=foxtran" title="Code">💻</a> <a href="#ideas-foxtran" title="Ideas, planning, and feedback.">💡</a> <a href="#maintenance-foxtran" title="Maintenance">🚧</a> <a href="#tool-foxtran" title="Tools">🔧</a> <a href="#userTesting-foxtran" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://smhasan.com/"><img src="https://avatars.githubusercontent.com/u/36223598?v=4?s=50" width="50px;" alt="Shah Mahdi Hasan "/><br /><sub><b>Shah Mahdi Hasan </b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Atanweer-mahdi" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=tanweer-mahdi" title="Code">💻</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Atanweer-mahdi" title="Reviewed Pull Requests">👀</a> <a href="#userTesting-tanweer-mahdi" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/pitmonticone"><img src="https://avatars.githubusercontent.com/u/38562595?v=4?s=50" width="50px;" alt="Pietro Monticone"/><br /><sub><b>Pietro Monticone</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Apitmonticone" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=pitmonticone" title="Documentation">📖</a> <a href="#ideas-pitmonticone" title="Ideas, planning, and feedback.">💡</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/sheevy"><img src="https://avatars.githubusercontent.com/u/1525683?v=4?s=50" width="50px;" alt="Mateusz Kubica"/><br /><sub><b>Mateusz Kubica</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=sheevy" title="Documentation">📖</a> <a href="#ideas-sheevy" title="Ideas, planning, and feedback.">💡</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://jaywadekar.github.io/"><img src="https://avatars.githubusercontent.com/u/5493388?v=4?s=50" width="50px;" alt="Jay Wadekar"/><br /><sub><b>Jay Wadekar</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3AJayWadekar" title="Bug reports">🐛</a> <a href="#ideas-JayWadekar" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-JayWadekar" title="Promotion">📣</a> <a href="#research-JayWadekar" title="Research">🔬</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/ablaom"><img src="https://avatars.githubusercontent.com/u/30517088?v=4?s=50" width="50px;" alt="Anthony Blaom, PhD"/><br /><sub><b>Anthony Blaom, PhD</b></sub></a><br /><a href="#infra-ablaom" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#ideas-ablaom" title="Ideas, planning, and feedback.">💡</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Aablaom" title="Reviewed Pull Requests">👀</a></td>
</tr>
<tr>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/Jgmedina95"><img src="https://avatars.githubusercontent.com/u/97254349?v=4?s=50" width="50px;" alt="Jgmedina95"/><br /><sub><b>Jgmedina95</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3AJgmedina95" title="Bug reports">🐛</a> <a href="#ideas-Jgmedina95" title="Ideas, planning, and feedback.">💡</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3AJgmedina95" title="Reviewed Pull Requests">👀</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/mcabbott"><img src="https://avatars.githubusercontent.com/u/32575566?v=4?s=50" width="50px;" alt="Michael Abbott"/><br /><sub><b>Michael Abbott</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=mcabbott" title="Code">💻</a> <a href="#ideas-mcabbott" title="Ideas, planning, and feedback.">💡</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Amcabbott" title="Reviewed Pull Requests">👀</a> <a href="#tool-mcabbott" title="Tools">🔧</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/oscardssmith"><img src="https://avatars.githubusercontent.com/u/11729272?v=4?s=50" width="50px;" alt="Oscar Smith"/><br /><sub><b>Oscar Smith</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=oscardssmith" title="Code">💻</a> <a href="#ideas-oscardssmith" title="Ideas, planning, and feedback.">💡</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://ericphanson.com/"><img src="https://avatars.githubusercontent.com/u/5846501?v=4?s=50" width="50px;" alt="Eric Hanson"/><br /><sub><b>Eric Hanson</b></sub></a><br /><a href="#ideas-ericphanson" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-ericphanson" title="Promotion">📣</a> <a href="#userTesting-ericphanson" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/henriquebecker91"><img src="https://avatars.githubusercontent.com/u/14113435?v=4?s=50" width="50px;" alt="Henrique Becker"/><br /><sub><b>Henrique Becker</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/commits?author=henriquebecker91" title="Code">💻</a> <a href="#ideas-henriquebecker91" title="Ideas, planning, and feedback.">💡</a> <a href="https://github.com/MilesCranmer/PySR/pulls?q=is%3Apr+reviewed-by%3Ahenriquebecker91" title="Reviewed Pull Requests">👀</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/qwertyjl"><img src="https://avatars.githubusercontent.com/u/110912592?v=4?s=50" width="50px;" alt="qwertyjl"/><br /><sub><b>qwertyjl</b></sub></a><br /><a href="https://github.com/MilesCranmer/PySR/issues?q=author%3Aqwertyjl" title="Bug reports">🐛</a> <a href="https://github.com/MilesCranmer/PySR/commits?author=qwertyjl" title="Documentation">📖</a> <a href="#ideas-qwertyjl" title="Ideas, planning, and feedback.">💡</a> <a href="#userTesting-qwertyjl" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://huijzer.xyz/"><img src="https://avatars.githubusercontent.com/u/20724914?v=4?s=50" width="50px;" alt="Rik Huijzer"/><br /><sub><b>Rik Huijzer</b></sub></a><br /><a href="#ideas-rikhuijzer" title="Ideas, planning, and feedback.">💡</a> <a href="#infra-rikhuijzer" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/GCaptainNemo"><img src="https://avatars.githubusercontent.com/u/43086239?v=4?s=50" width="50px;" alt="Hongyu Wang"/><br /><sub><b>Hongyu Wang</b></sub></a><br /><a href="#ideas-GCaptainNemo" title="Ideas, planning, and feedback.">💡</a> <a href="#promotion-GCaptainNemo" title="Promotion">📣</a> <a href="#research-GCaptainNemo" title="Research">🔬</a></td>
</tr>
<tr>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/ZehaoJin"><img src="https://avatars.githubusercontent.com/u/50961376?v=4?s=50" width="50px;" alt="Zehao Jin"/><br /><sub><b>Zehao Jin</b></sub></a><br /><a href="#research-ZehaoJin" title="Research">🔬</a> <a href="#promotion-ZehaoJin" title="Promotion">📣</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/tmengel"><img src="https://avatars.githubusercontent.com/u/38924390?v=4?s=50" width="50px;" alt="Tanner Mengel"/><br /><sub><b>Tanner Mengel</b></sub></a><br /><a href="#research-tmengel" title="Research">🔬</a> <a href="#promotion-tmengel" title="Promotion">📣</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/agrundner24"><img src="https://avatars.githubusercontent.com/u/38557656?v=4?s=50" width="50px;" alt="Arthur Grundner"/><br /><sub><b>Arthur Grundner</b></sub></a><br /><a href="#research-agrundner24" title="Research">🔬</a> <a href="#promotion-agrundner24" title="Promotion">📣</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://github.com/sjwetzel"><img src="https://avatars.githubusercontent.com/u/24393721?v=4?s=50" width="50px;" alt="sjwetzel"/><br /><sub><b>sjwetzel</b></sub></a><br /><a href="#research-sjwetzel" title="Research">🔬</a> <a href="#promotion-sjwetzel" title="Promotion">📣</a> <a href="#userTesting-sjwetzel" title="User Testing">📓</a></td>
<td align="center" valign="top" width="12.5%"><a href="https://sauravmaheshkar.github.io/"><img src="https://avatars.githubusercontent.com/u/61241031?v=4?s=50" width="50px;" alt="Saurav Maheshkar"/><br /><sub><b>Saurav Maheshkar</b></sub></a><br /><a href="#tool-SauravMaheshkar" title="Tools">🔧</a></td>
</tr>
</tbody>
</table>
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