A Python 🐍 Package for Markov Chains, Markov Chain Neural Networks and Markov Switching Models.

• Covers most of the fundamental agorithms for Markov Chain Analysis
• Memory efficient Model saving
• Faster than other libraries (eg: 5x Faster than PyDTMC)
• First Package to contain functions to build equivalent Markov Chain Neural Networks from Markov Chains.
• Contains Markov Switching Models for Univariate Time Series Analysis

Before you begin, ensure you have the following installed on your system:

• Python (>= 3.9 )

Fork and Clone the Chainopy repository to your local machine using Git:

git clone https://github.com/username/chainopy.git

Navigate to the directory which contains the setup.py file.

pip install -r requirements.txt
pip install -r requirements_test.txt

python3 setup.py build_ext --inplace

Run tests as described in the tests section

pip install .

1. Clone the project locally
2. Install packages mentioned in requirements.txt and requirements_test.txt
3. Navigate to the directory containing tests folder
4. Run the following command:

python -m pytest tests/

You're all Set! 😃 👍

Create Markov Chains and Markov Chain Neural Networks as follows:

>>> import chainopy
>>> mc = chainopy.MarkovChain([[0, 1], [1, 0]], states = ["Rain", "No-Rain"])    # Creates a two-states Markov Chain stored in `mc`.
>>> neural_network = chainopy.MarkovChainNeuralNetwork(mc, num_layers = 5)    # Creates a 5-layered Neural Network that simulates `mc`. 

Create a Markov Switching Model as follows:

>>> import numpy as np
>>> import random
>>> from chainopy import MarkovSwitchingModel
>>> X = np.random.normal(0, 1, 1000) + np.random.logistic(5, 10, 1000) # Generate Random Training Data
>>> regime_col = [random.choice(["High", "Low", "Stagnant"]) for _ in range(1000)] # Generate Regimes for Training Data
>>> mod = MarkovSwitchingModel()
>>> mod.fit(X, regime_col)
>>> y, regime_y = mod.predict("High", steps=20)

Generates Data as follows:

• X: We generate 1000 data points by combining a normal distribution (mean = 0, standard deviation = 1) with a logistic distribution (mean = 5, scale = 10). This creates a complex dataset with variations.
• regime_col: We assign one of three possible regimes ("High", "Low", "Stagnant") to each data point. This is done by randomly selecting one of these regimes for each of the 1000 data points.

Later, Creates a Markov Switching Model using chainopy.MarkovSwitchingModel with 3 regimes (High, Low and Stagnant) and predicts the next twenty steps if the start states is "High".

1. Fork the Project.
2. Clone the Project locally.
3. Create a New Branch to Contribute.
4. run pip install -r requirements.txt and pip install -r requirements_test.txt to download dependencies.
5. Do the changes of interest (Make sure to write docstrings).
6. Write Unit Tests and test your implementation.
7. Format the code using the Black Formatter.
8. Push the changes and submit a Pull Request.

Note: If your implementation is Cython, justify its usage in your PR to make the code more maintainable.