CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.1.21] - 2022-12-31

Added

1. BayesianNetwork.get_state_probability method to compute the probability of a given evidence.
2. BayesianEstimator.estimate_cpd accepts weighted datasets.

Fixed

1. Fixes bug in CausalInference.estimate_ate with front-door criterion.
2. Fixes inference bugs when variable has a single state.

[0.1.20] - 2022-09-30

Added

1. BayesianNetwork.get_random_cpds method to randomly parameterize a network structure.
2. Faster Variable Elimination using tensor contraction.
3. factors.factor_sum_product method for faster sum-product operations using tensor contraction.

Fixed

1. Bug in DynamicBayesianNetwork.initialize_initial_state. #1564
2. Bug in factors.factor_product. #1565

Changed

1. Runtime improvements in DiscreteFactor.marginalize and DiscreteFactor.copy methods.

[0.1.19] - 2022-06-30

Added

1. Adds checks for arguments to BayesianNetwork.simulate method.

Fixed

1. Fixes TAN algorithm to use conditional information metric.
2. Speed ups for all estimation and inference methods.
3. Fix in stable variant of PC algorithm to give reproducible results.
4. Fix in GibbsSampling for it to work with variables with integral names.
5. DAG.active_trail_nodes allows tuples as variable names.
6. Fixes CPD and edge creation in UAIReader.

[0.1.18] - 2022-03-30

Fixed

1. Fixes CausalInference.is_valid_backdoor_adjustment_set to accept str arguments for Z.
2. Fixes BayesianNetwork.remove_cpd to work with integral node names.
3. Fixes MPLP.map_query to return the variable states instead of probability values.
4. Fixes BIFWriter to generate output in standard BIF format.

[0.1.17] - 2021-12-30

Added

1. Adds BayesianNetwork.states property to store states of all the variables.
2. Adds extra checks in check model for state names

Fixed

1. Fixes typos in BayesianModel deprecation warning
2. Bug fix in printing Linear Gaussian CPD
3. Update example notebooks to work on latest dev.

[0.1.16] - 2021-09-30

Added

1. Adds a fit_update method to BayesianNetwork for updating model using new data.
2. Adds simulate method to BayesianNetwork and DynamicBayesianNetwork to simulated data under different conditions.
3. Adds DynamicBayesianNetwork.fit method to learn model paramters from data.
4. ApproxInference class to do approximate inference on models using sampling.
5. Robust tests for all sampling methods.
6. Adds BayesianNetwork.load and BayesianNetwork.save to quickly read and write files.

Changed

1. BayesianModel and MarkovModel renamed to BayesianNetwork and MarkovNetwork respectively.
2. The default value of node position in DAG.to_daft method.
3. Documentation updated on the website.

Fixed

1. Fixes bug in DAG.is_iequivalent method.
2. Automatically truncate table when CPD is too large.
3. Auto-adjustment of probability values when they don't exactly sum to 1.
4. tqdm works both in notebooks and terminal.
5. Fixes bug in CausalInference.query method.

[0.1.15] - 2021-06-30

Added

1. Adds network pruning for inference algrithms to reduce the size of network before running inference.
2. Adds support for latent variables in DAG and BayesianModel.
3. Parallel implementation for parameter estimation algorithms.
4. Adds DAG.get_random and BayesianModel.get_random methods to be able to generate random models.
5. Adds CausalInference.query method for doing do operation inference with or without adjustment sets.
6. Adds functionality to treesearch to do auto root and class node selection (#1418)
7. Adds option to specify virtual evidence in bayesian network inference.
8. Adds Expectation-Maximization (EM) algorithm for parameter estimation in latent variable models.
9. Add BDeuScore as another option for structure score when using HillClimbSearch.
10. Adds CausalInference.get_minimal_adjustment_set` for finding adjustment sets.

Changed

1. Renames DAG.is_active_trail to is_dconnected.
2. DAG.do can accept multiple variables in the argument.
3. Optimizes sampling methods.
4. CI moved from travis and appveyor to github actions.
5. Drops support for python 3.6. Requires 3.7+.

Fixed

1. Example model files were not getting included in the pypi and conda packages.
2. The order of values returned by CI tests was wrong. #1403
3. Adjusted and normalized MI wasn't working properly in TreeSearch.
4. #1423: Value error in bayesian estimation.
5. Fixes bug in DiscreteFactor.__eq__ to also consider the state names order.

[0.1.14] - 2021-03-31

Added

1. Adds support for python 3.9.
2. BayesianModelProbability class for calculating pmf for BNs.
3. BayesianModel.predict has a new argument stochastic which returns stochastic results instead of MAP.
4. Adds new method pgmpy.base.DAG.to_daft to easily convert models into publishable plots.

Changed

1. pgmpy.utils.get_example_model now doesn't need internet connection to work. Files moved locally.

Fixed

1. Latex output of pgmpy.DAG.get_independencies.
2. Bug fix in PC algorithm as it was skipping some combinations.
3. Error in sampling because of seed not correctly set.

[0.1.13] - 2020-12-30

Added

1. New conditional independence tests for discrete variables

Changed

1. Adds warning in BayesianEstimator when using dirichlet prior.

Fixed

1. Bug in PC.skeleton_to_pdag.
2. Bug in HillClimbSearch when no legal operations.

Removed

[0.1.12] - 2020-09-30

Added

1. PC estimator with original, stable, and parallel variants.
2. PDAG class to represent partially directed DAGs.
3. pgmpy.utils.get_example_model function to fetch models from bnlearn repository.
4. Refactor HillClimbSearch with a new feature to specify fixed edges in the model.
5. Adds a global SHOW_PROGRESS variable.
6. Adds Chow-Liu structure learning algorithm.
7. Add pgmpy.utils.get_example_model to fetch models from bnlearn's repository.
8. Adds get_value and set_value method to DiscreteFactor to get/set a single value.
9. Adds get_acestral_graph to DAG.

Changed

1. Refactors ConstraintBasedEstimators into PC with a lot of general improvements.
2. Improved (faster, new arguments) indepenedence tests with changes in argument.
3. Refactors sample_discrete method. Sampling algorithms much faster.
4. Refactors HillClimbSearch to be faster.
5. Sampling methods now return dataframe of type categorical.

Fixed

Removed

1. Data class.

[0.1.11] - 2020-06-30

Added

• New example notebook: Alarm.ipynb
• Support for python 3.8
• Score Caching support for scoring methods.

Changed

• Code quality check moved to codacy from landscape
• Additional parameter max_ci_vars for ConstraintBasedEstimator.
• Additional parameter pseudo_count for K2 score.
• Sampling methods return state names instead of number when available.
• XMLBIFReader and BIFReader not accepts argument for specifying state name type.

Fixed

• Additional checks for TabularCPD values shape.
• DiscreteFactor.reduce accepts both state names and state numbers for variables.
• BeliefPropagation.query fixed to return normalized CPDs.
• Bug in flip operation in HillClimbSearch.
• BIFWriter to write the state names to file if available.
• BayesianModel.to_markov_model fixed to work with disconnected graphs.
• VariableElimination fixed to not ignore identifical factors.
• Fixes automatic sorting of state names in estimators.

Removed

• No support for ProbModelXML file format.

[0.1.10] - 2020-01-22

Added

• Documentation updated to include Structural Equation Models(SEM) and Causal Inference.
• Adds Mmhc estimator.

Changed

• BdeuScore is renamed to BDeuScore.
• Refactoring of NaiveBayes
• Overhaul of CI and setup infrastructure.
• query methods check for common variabls in variable and evidence argument.

Fixed

• Example notebooks for Inference.
• DAG.moralize gives consistent results for disconnected graphs.
• Fixes problems with XMLBIF and BIF reader and writer classes to be consistent.
• Better integration of state names throughout the package.
• Improves remove_factors and add_factors methods of FactorGraph
• copy method of TabularCPD and DiscreteFactor now makes a copy of state names.

Removed

• six not a dependency anymore.