Comparison of Controlled Undersampling Methods for Machine Learning

Data reduction is an important preprocessing operation for Machine Learning to learn from large datasets, especially in the case of applications requiring online learning using constrained resources. Our survey focuses on a specific family of data reduction methods - controlled undersampling methods. We observe the behaviour of the methods as they cooperate with several supervised machine-learning techniques over multiple evaluation datasets. Our results show that the random undersampling method offers surprisingly good results compared to more complex methods and is a good fit for online and resource-sensitive machine-learning applications.