Multi-objective genetic programming for visual analytics

Authors:
Ilknur Icke;Andrew Rosenberg
Affiliations:
The Graduate Center, The City University of New York, New York, NY;The Graduate Center, The City University of New York, New York, NY and Queens College
Venue:
EuroGP'11 Proceedings of the 14th European conference on Genetic programming
Year:
2011

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Abstract

Visual analytics is a human-machine collaboration to data modeling where extraction of the most informative features plays an important role. Although feature extraction is a multi-objective task, the traditional algorithms either only consider one objective or aggregate the objectives into one scalar criterion to optimize. In this paper, we propose a Pareto-based multi-objective approach to feature extraction for visual analytics applied to data classification problems. We identify classifiability, visual interpretability and semantic interpretability as the three equally important objectives for feature extraction in classification problems and define various measures to quantify these objectives. Our results on a number of benchmark datasets show consistent improvement compared to three standard dimensionality reduction techniques. We also argue that exploration of the multiple Pareto-optimal models provide more insight about the classification problem as opposed to a single optimal solution.