Sparse Functional Relevance Learning in Generalized Learning Vector Quantization

Relevance learning in learning vector quantization is a central paradigm for classi cation task depending feature weighting and selection. We propose a functional approach to relevance learning for highdimensional functional data. For this purpose we compose the relevance pro le by a superposition of only a few parametrized basis functions taking into account the functional character of the data. The number of these parameters is usually signi cantly smaller than the number of relevance weights in standard relevance learning, which is the number of data dimensions. Thus, instabilities in learning are avoided and an inherent regularization takes place. In addition, we discuss strategies to obtain sparse relevance models for further model optimization. keywords: functional vector quantization, relevance learning, feature weighting and selection, sparse models ∗corresponding author, email: [email protected]