Analysing the Footprint of Classifiers in Overlapped and Imbalanced Contexts

• Type: Article in International Conference Proceedings Book
• Date: 2018

Authors

Marta Mercier (Author) Other; Miriam S. Santos (Author) Other; Pedro H. Abreu (Author) Other; Carlos Soares (Author) FEUP; Jastin P. Soares (Author) Other; João Santos (Author) Other

Conference proceedings International

Title: Advances in Intelligent Data Analysis XVII - 17th International Symposium, IDA 2018, 's-Hertogenbosch, The Netherlands, October 24-26, 2018, Proceedings

Pages: 200-212

17th International Symposium on Intelligent Data Analysis, IDA 2018

24 October 2018 through 26 October 2018

Indexing

Scopus - 7 Citations

INSPEC

Other information

Authenticus ID: P-00P-TNW

DOI: 10.1007/978-3-030-01768-2_17

Abstract (EN): It is recognised that the imbalanced data problem is aggravated by other difficulty factors, such as class overlap. Over the years, several research works have focused on this problematic, although presenting two major hitches: the limitation of test domains and the lack of a formulation of the overlap degree, which makes results hard to generalise. This work studies the performance degradation of classifiers with distinct learning biases in overlap and imbalanced contexts, focusing on the characteristics of the test domains (shape, dimensionality and imbalance ratio) and on to what extent our proposed overlapping measure (degOver) is aligned with the performance results observed. Our results show that MLP and CART classifiers are the most robust to high levels of class overlap, even for complex domains, and that KNN and linear SVM are the most aligned with degOver. Furthermore, we found that the dimensionality of data also plays an important role in explaining performance results. © Springer Nature Switzerland AG 2018.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13