Feature Construction Methods: A Survey
نویسنده
چکیده
A good feature representation is central to achieving high performance in any machine learning task. However manually defining a good feature set is often not feasible. Feature construction involves transforming a given set of input features to generate a new set of more powerful features which can then used for prediction. Several feature construction methods have been developed. In this paper we present a survey of past 20 years of research in the area. We describe the major issues involved and discuss the manner in which various methods deal with them. While our understanding of feature construction has grown significantly over the years, a number of open challenges continue to remain.
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