A1 Refereed original research article in a scientific journal

Training linear ranking SVMs in linearithmic time using red-black trees




AuthorsAntti Airola, Tapio Pahikkala, Tapio Salakoski

PublisherELSEVIER SCIENCE BV

Publication year2011

JournalPattern Recognition Letters

Journal name in sourcePATTERN RECOGNITION LETTERS

Journal acronymPATTERN RECOGN LETT

Number in series11

Volume32

Issue9

First page 1328

Last page1336

Number of pages9

ISSN0167-8655

DOIhttps://doi.org/10.1016/j.patrec.2011.03.014


Abstract

We introduce an efficient method for training the linear ranking support vector machine. The method combines cutting plane optimization with red-black tree based approach to subgradient calculations, and has O(ms + mlog (m)) time complexity, where m is the number of training examples, and s the average number of non-zero features per example. Best previously known training algorithms achieve the same efficiency only for restricted special cases, whereas the proposed approach allows any real valued utility scores in the training data. Experiments demonstrate the superior scalability of the proposed approach, when compared to the fastest existing RankSVM implementations.




Last updated on 2024-26-11 at 15:24