Causal Discovery and Classification Using Lempel-Ziv Complexity

• URL: http://arxiv.org/abs/2411.01881v1
• Date: Mon, 04 Nov 2024 08:24:56 GMT
• Title: Causal Discovery and Classification Using Lempel-Ziv Complexity
• Authors: Dhruthi, Nithin Nagaraj, Harikrishnan N B,
• Abstract summary: We introduce a novel causality measure and a distance metric derived from Lempel-Ziv complexity. We evaluate the effectiveness of the causality-based decision tree and the distance-based decision tree.
• Score: 2.7309692684728617
• License:
• Abstract: Inferring causal relationships in the decision-making processes of machine learning algorithms is a crucial step toward achieving explainable Artificial Intelligence (AI). In this research, we introduce a novel causality measure and a distance metric derived from Lempel-Ziv (LZ) complexity. We explore how the proposed causality measure can be used in decision trees by enabling splits based on features that most strongly \textit{cause} the outcome. We further evaluate the effectiveness of the causality-based decision tree and the distance-based decision tree in comparison to a traditional decision tree using Gini impurity. While the proposed methods demonstrate comparable classification performance overall, the causality-based decision tree significantly outperforms both the distance-based decision tree and the Gini-based decision tree on datasets generated from causal models. This result indicates that the proposed approach can capture insights beyond those of classical decision trees, especially in causally structured data. Based on the features used in the LZ causal measure based decision tree, we introduce a causal strength for each features in the dataset so as to infer the predominant causal variables for the occurrence of the outcome.

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