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mirror of https://github.com/gsi-upm/soil synced 2025-08-24 03:52:20 +00:00

Pre-release version of v1.0

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J. Fernando Sánchez
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Welcome to Soil's documentation!
================================
Soil is an Agent-based Social Simulator in Python focused on Social Networks.
Soil is an opinionated Agent-based Social Simulator in Python focused on Social Networks.
.. image:: soil.png
:width: 80%
:align: center
Soil can be installed through pip (see more details in the :doc:`installation` page):
.. code:: bash
pip install soil
To get started developing your own simulations and agent behaviors, check out our :doc:`Tutorial <soil_tutorial>` and the `examples on GitHub <https://github.com/gsi-upm/soil/tree/master/examples>.
If you use Soil in your research, do not forget to cite this paper:
@@ -33,8 +46,6 @@ If you use Soil in your research, do not forget to cite this paper:
:caption: Learn more about soil:
installation
quickstart
configuration
Tutorial <soil_tutorial>
..

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Installation
------------
The easiest way to install Soil is through pip, with Python >= 3.4:
Through pip
===========
The easiest way to install Soil is through pip, with Python >= 3.8:
.. code:: bash
@@ -25,4 +28,38 @@ Or, if you're using using soil programmatically:
import soil
print(soil.__version__)
The latest version can be installed through `GitHub <https://github.com/gsi-upm/soil>`_ or `GitLab <https://lab.gsi.upm.es/soil/soil.git>`_.
Web UI
======
Soil also includes a web server that allows you to upload your simulations, change parameters, and visualize the results, including a timeline of the network.
To make it work, you have to install soil like this:
.. code::
pip install soil[web]
Once installed, the soil web UI can be run in two ways:
.. code::
soil-web
# OR
python -m soil.web
Development
===========
The latest version can be downloaded from `GitHub <https://github.com/gsi-upm/soil>`_ and installed manually:
.. code:: bash
git clone https://github.com/gsi-upm/soil
cd soil
python -m venv .venv
source .venv/bin/activate
pip install --editable .

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What are the main changes between version 0.3 and 0.2?
######################################################
What are the main changes in version 1.0?
#########################################
Version 0.3 is a major rewrite of the Soil system, focused on simplifying the API, aligning it with Mesa, and making it easier to use.
Version 1.0 is a major rewrite of the Soil system, focused on simplifying the API, aligning it with Mesa, and making it easier to use.
Unfortunately, this comes at the cost of backwards compatibility.
We drew several lessons from the previous version of Soil, and tried to address them in this version.

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Quickstart
----------
This section shows how to run your first simulation with Soil.
For installation instructions, see :doc:`installation`.
There are mainly two parts in a simulation: agent classes and simulation configuration.
An agent class defines how the agent will behave throughout the simulation.
The configuration includes things such as number of agents to use and their type, network topology to use, etc.
.. image:: soil.png
:width: 80%
:align: center
Soil includes several agent classes in the ``soil.agents`` module, and we will use them in this quickstart.
If you are interested in developing your own agents classes, see :doc:`soil_tutorial`.
Configuration
=============
To get you started, we will use this configuration (:download:`download the file <quickstart.yml>` directly):
.. literalinclude:: quickstart.yml
:language: yaml
The agent type used, SISa, is a very simple model.
It only has three states (neutral, content and discontent),
Its parameters are the probabilities to change from one state to another, either spontaneously or because of contagion from neighboring agents.
Running the simulation
======================
To see the simulation in action, simply point soil to the configuration, and tell it to store the graph and the history of agent states and environment parameters at every point.
.. code::
soil --graph --csv quickstart.yml [13:35:29]
INFO:soil:Using config(s): quickstart
INFO:soil:Dumping results to soil_output/quickstart : ['csv', 'gexf']
INFO:soil:Starting simulation quickstart at 13:35:30.
INFO:soil:Starting Simulation quickstart trial 0 at 13:35:30.
INFO:soil:Finished Simulation quickstart trial 0 at 13:35:49 in 19.43677067756653 seconds
INFO:soil:Starting Dumping simulation quickstart trial 0 at 13:35:49.
INFO:soil:Finished Dumping simulation quickstart trial 0 at 13:35:51 in 1.7733407020568848 seconds
INFO:soil:Dumping results to soil_output/quickstart
INFO:soil:Finished simulation quickstart at 13:35:51 in 21.29862952232361 seconds
The ``CSV`` file should look like this:
.. code::
agent_id,t_step,key,value
env,0,neutral_discontent_spon_prob,0.05
env,0,neutral_discontent_infected_prob,0.1
env,0,neutral_content_spon_prob,0.2
env,0,neutral_content_infected_prob,0.4
env,0,discontent_neutral,0.2
env,0,discontent_content,0.05
env,0,content_discontent,0.05
env,0,variance_d_c,0.05
env,0,variance_c_d,0.1
Results and visualization
=========================
The environment variables are marked as ``agent_id`` env.
Th exported values are only stored when they change.
To find out how to get every key and value at every point in the simulation, check out the :doc:`soil_tutorial`.
The dynamic graph is exported as a .gexf file which could be visualized with
`Gephi <https://gephi.org/users/download/>`__.
Now it is your turn to experiment with the simulation.
Change some of the parameters, such as the number of agents, the probability of becoming content, or the type of network, and see how the results change.
Soil also includes a web server that allows you to upload your simulations, change parameters, and visualize the results, including a timeline of the network.
To make it work, you have to install soil like this:
.. code::
pip install soil[web]
Once installed, the soil web UI can be run in two ways:
.. code::
soil-web
# OR
python -m soil.web

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---
name: quickstart
num_trials: 1
max_time: 1000
model_params:
agents:
- agent_class: SISaModel
topology: true
state:
id: neutral
weight: 1
- agent_class: SISaModel
topology: true
state:
id: content
weight: 2
topology:
params:
n: 100
k: 5
p: 0.2
generator: newman_watts_strogatz_graph
neutral_discontent_spon_prob: 0.05
neutral_discontent_infected_prob: 0.1
neutral_content_spon_prob: 0.2
neutral_content_infected_prob: 0.4
discontent_neutral: 0.2
discontent_content: 0.05
content_discontent: 0.05
variance_d_c: 0.05
variance_c_d: 0.1
content_neutral: 0.1
standard_variance: 0.1

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