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Context-sensitive ranking

Project description

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CS-Rank

CS-Rank is a Python package for context-sensitive ranking and choice algorithms.

We implement the following new object ranking/choice architectures:

  • FATE (First aggregate then evaluate)
  • FETA (First evaluate then aggregate)

In addition, we also implement these algorithms for choice functions:

  • RankNetChoiceFunction
  • GeneralizedLinearModel
  • PairwiseSVMChoiceFunction

These are the state-of-the-art approaches implemented for the discrete choice setting:

  • GeneralizedNestedLogitModel
  • MixedLogitModel
  • NestedLogitModel
  • PairedCombinatorialLogit
  • RankNetDiscreteChoiceFunction
  • PairwiseSVMDiscreteChoiceFunction

Check out our interactive notebooks to quickly find out what our package can do.

Getting started

As a simple “Hello World!”-example we will try to learn the Pareto problem:

import csrank as cs
from csrank import ChoiceDatasetGenerator
gen = ChoiceDatasetGenerator(dataset_type='pareto',
                                n_objects=30,
                                n_features=2)
X_train, Y_train, X_test, Y_test = gen.get_single_train_test_split()

All our learning algorithms are implemented using the scikit-learn estimator API. Fitting our FATENet architecture is as simple as calling the fit method:

fate = cs.FATEChoiceFunction(n_object_features=2)
fate.fit(X_train, Y_train)

Predictions can then be obtained using:

fate.predict(X_test)

Installation

The latest release version of CS-Rank can be installed from Github as follows:

pip install git+https://github.com/kiudee/cs-ranking.git

Another option is to clone the repository and install CS-Rank using:

python setup.py install

Dependencies

CS-Rank depends on Tensorflow, Keras, NumPy, SciPy, matplotlib, scikit-learn, scikit-optimize, joblib and tqdm. For data processing and generation you will also need PyGMO, H5Py and pandas.

Citing CS-Rank

You can cite our arXiv papers:

@article{csrank2019,
  author    = {Karlson Pfannschmidt and
               Pritha Gupta and
               Eyke H{\"{u}}llermeier},
  title     = {Learning Choice Functions: Concepts and Architectures },
  journal   = {CoRR},
  volume    = {abs/1901.10860},
  year      = {2019}
}

@article{csrank2018,
  author    = {Karlson Pfannschmidt and
               Pritha Gupta and
               Eyke H{\"{u}}llermeier},
  title     = {Deep architectures for learning context-dependent ranking functions},
  journal   = {CoRR},
  volume    = {abs/1803.05796},
  year      = {2018}
}

License

Apache License, Version 2.0

History

1.1.0 (2020-03-19)

  • Add the expected reciprocal rank (ERR) metric.
  • Fix bug in callbacks causing the wrong learning rate schedule to be applied.
  • Make csrank easier to install by making some dependencies optional.
  • Add guidelines for how to contribute to the project.

1.0.2 (2020-02-12)

  • Fix deployment to GH-pages

1.0.1 (2020-02-03)

  • Add HISTORY.rst file to track changes over time
  • Set up travis-ci for deployment to PyPi

1.0.0 (2018-03-05)

  • Initial release

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