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From outliers to prototypes: Ordering data

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons83954

Harmeling,  S
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84096

Müller,  K-R
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Harmeling, S., Dornhege G, Tax D, Meinecke, F., & Müller, K.-R. (2006). From outliers to prototypes: Ordering data. Neurocomputing, 69(13-15), 1608-1618. doi:10.1016/j.neucom.2005.05.015.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-D089-5
Zusammenfassung
We propose simple and fast methods based on nearest neighbors that order objects from high-dimensional data sets from typical points to untypical points. On the one hand, we show that these easy-to-compute orderings allow us to detect outliers (i.e. very untypical points) with a performance comparable to or better than other often much more sophisticated methods. On the other hand, we show how to use these orderings to detect prototypes (very typical points) which facilitate exploratory data analysis algorithms such as noisy nonlinear dimensionality reduction and clustering. Comprehensive experiments demonstrate the validity of our approach.