The effect of noise and sample size on an unsupervised feature selection method for manifold learning
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The research on unsupervised feature selection is scarce in comparison to that for supervised models, despite the fact that this is an important issue for many clustering problems. An unsupervised feature selection method for general Finite Mixture Models was recently proposed and subsequently extended to Generative Topographic Mapping (GTM), a manifold learning constrained mixture model that provides data visualization. Some of the results of a previous partial assessment of this unsupervised feature selection method for GTM suggested that its performance may be affected by insufficient sample size and by noisy data. In this brief study, we test in some detail such limitations of the method.
CitacióVellido, A.; Velazco, J. The effect of noise and sample size on an unsupervised feature selection method for manifold learning. A: IEEE World Congress on Computational Intelligence / International Joint-Conference on Artificial Neural Networks. "IEEE International Joint Conference on Neural Networks 2008". IEEE, 2008, p. 523-528.