bayes-compass 0.1.3

COMPASS: A Python package for bayesian model comparison in a simulation based setting

COMPASS: Comparison Of Models using Probabilistic Assessment in Simulation-based Settings

COMPASS is a Python package designed for Bayesian Model Comparison in simulation-based settings. By comparing the predictive power of various models, it aims to identify the most suitable model for a given dataset.
It is especially suited for fields like astrophysics and computational biology, where simulation is integral to the modeling process.

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Features

• Perform Bayesian model comparison in simulation-based settings.
• Simulate, train, and evaluate models with ease.
• Tools for posterior model probability comparison.
• Includes ModelTransfuser and ScoreBasedInferenceModel classes for seamless workflows.

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Installation

Install the package using pip:

pip install bayes-compass

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Usage

Model Comparison Example

The ModelTransfuser class provides a framework for model comparison workflows:

from compass import ModelTransfuser

# Initialize the ModelTransfuser
MTf = ModelTransfuser()

# Add data from simulators
MTf.add_data(model_name="Model1", train_data=data_1, val_data=val_data_1)
MTf.add_data(model_name="Model2", train_data=data_2, val_data=val_data_2)

# Initialize ScoreBasedInferenceModels
MTf.init_models()

# Train the models
MTf.train_models()

# Compare Posterior Model Probabilities
observations = load_your_observations
MTf.compare(x=observations, err=observations_err)

stats = MTf.stats

# Plot results
MTf.plots()

Simulation-Based Inference Example

The ScoreBasedInferenceModel class allows for estimating parameters using a score-based approach:

from compass import ScoreBasedInferenceModel

SBIm = ScoreBasedInferenceModel(node_size=128)

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Contributing

Contributions are welcome! Feel free to open issues or submit pull requests to improve this package.

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