Multi-class Support Vector Machine (SVM) Classifiers -- An Application in Hypothyroid Detection and Classification

The paper presents a Multi-class Support Vector Machine classifier and its application to hypothyroid detection and classification. Support Vector Machines (SVM) have been well known method in the machine learning community for binary classification problems. Multi-class SVMs (MCSVM) are usually implemented by combining several binary SVMs. The objective of this work is to show: first, robustness of various kind of kernels for Multi-class SVM classifier, second, a comparison of different constructing methods for Multi-class SVM, such as One-Against-One and One-Against-All, and finally comparing the classifiers´ accuracy of Multi-class SVM classifier to AdaBoost and Decision Tree. The simulation results show that One-Against-All Support Vector Machines (OAASVM) are superior to One-Against-One Support Vector Machines (OAOSVM) with polynomial kernels. The accuracy of OAASVM is also higher than AdaBoost and Decision Tree classifier on hypothyroid disease datasets from UCI machine learning dataset.