Search Results for author: Jason Long

Found 7 papers, 1 papers with code

Robust Counterfactual Explanations for Tree-Based Ensembles

no code implementations6 Jul 2022 Sanghamitra Dutta, Jason Long, Saumitra Mishra, Cecilia Tilli, Daniele Magazzeni

In this work, we propose a novel strategy -- that we call RobX -- to generate robust counterfactuals for tree-based ensembles, e. g., XGBoost.

counterfactual

Reductive MDPs: A Perspective Beyond Temporal Horizons

no code implementations15 May 2022 Thomas Spooner, Rui Silva, Joshua Lockhart, Jason Long, Vacslav Glukhov

Solving general Markov decision processes (MDPs) is a computationally hard problem.

Optimal Admission Control for Multiclass Queues with Time-Varying Arrival Rates via State Abstraction

no code implementations14 Mar 2022 Marc Rigter, Danial Dervovic, Parisa Hassanzadeh, Jason Long, Parisa Zehtabi, Daniele Magazzeni

To improve the scalability of our approach to a greater number of task classes, we present an approximation based on state abstraction.

Counterfactual Shapley Additive Explanations

2 code implementations27 Oct 2021 Emanuele Albini, Jason Long, Danial Dervovic, Daniele Magazzeni

Feature attributions are a common paradigm for model explanations due to their simplicity in assigning a single numeric score for each input feature to a model.

counterfactual Counterfactual Explanation +2

Counterfactual Explanations for Arbitrary Regression Models

no code implementations29 Jun 2021 Thomas Spooner, Danial Dervovic, Jason Long, Jon Shepard, Jiahao Chen, Daniele Magazzeni

We present a new method for counterfactual explanations (CFEs) based on Bayesian optimisation that applies to both classification and regression models.

Bayesian Optimisation counterfactual +1

Partial associativity and rough approximate groups

no code implementations18 Apr 2019 W. T. Gowers, Jason Long

We prove that this is indeed the case: there must be a proportional-sized subset of the multiplication table that approximately agrees with part of the multiplication table of a metric group.

Combinatorics

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