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Geometric SVM: A Fast and Intuitive SVM Algorithm

Vishwanathan, SVN and Murty, Narasimha M (2002) Geometric SVM: A Fast and Intuitive SVM Algorithm. In: 16th International Conference on Pattern Recognition, 2002, 11-15 August, Canada, Vol.2, 56-59.


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We present a geometrically motivated algorithm for finding the Support Vectors of a given set of points. This algorithm is reminiscent of the DirectSVM algorithm, in the way it picks data points for inclusion in the Support Vector set, but it uses an optimization based approach to add them to the Support Vector set. This ensures that the algorithm scales to $O(n^3)$ in the worst case and $O({n}\mid{S}\mid^{2})$ in the average case where n is the total number of points in the data set and $\mid{S}\mid$ is the number of Support Vectors. Further the memory requirements also scale as $O(n^2)$ in the worst case and $O(\mid{S}\mid^{2})$ in the average case. The advantage of this algorithm is that it is more intuitive and performs extremely well when the number of Support Vectors is only a small fraction of the entire data set. It can also be used to calculate leave one out error based on the order in which data points were added to the Support Vector set. We also present results on real life data sets to validate our claims.

Item Type: Conference Paper
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Computer Science & Automation
Depositing User: HS Usha
Date Deposited: 27 Jan 2006
Last Modified: 19 Sep 2010 04:23
URI: http://eprints.iisc.ac.in/id/eprint/5224

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