Heatmap visualization of population based multi objective algorithms

Authors:
Andy Pryke;Sanaz Mostaghim;Alireza Nazemi
Affiliations:
Cercia, School of Computer Science, University of Birmingham, Birmingham, UK;AIFB Institute, University of Karlsruhe, Karlsruhe, Germany;Department of Civil Engineering, University of Birmingham, Birmingham, UK
Venue:
EMO'07 Proceedings of the 4th international conference on Evolutionary multi-criterion optimization
Year:
2007

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Abstract

Understanding the results of a multi objective optimization process can be hard. Various visualization methods have been proposed previously, but the only consistently popular one is the 2D or 3D objective scatterplot, which cannot be extended to handle more than 3 objectives. Additionally, the visualization of high dimensional parameter spaces has traditionally been neglected. We propose a new method, based on heatmaps, for the simultaneous visualization of objective and parameter spaces. We demonstrate its application on a simple 3D test function and also apply heatmaps to the analysis of real-world optimization problems. Finally we use the technique to compare the performance of two different multi-objective algorithms.