Rough Self Organizing Map

Authors:
Sankar K. Pal;Biswarup Dasgupta;Pabitra Mitra
Affiliations:
Machine Intelligence Unit, Indian Statistical Institute, Kolkata 700108, India. sankar@isical.ac.in;Machine Intelligence Unit, Indian Statistical Institute, Kolkata 700108, India. biswarupdg@yahoo.com;Machine Intelligence Unit, Indian Statistical Institute, Kolkata 700108, India. pabitra_r@isical.ac.in
Venue:
Applied Intelligence
Year:
2004

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Abstract

A rough self-organizing map (RSOM) with fuzzy discretization of feature space is described here. Discernibility reducts obtained using rough set theory are used to extract domain knowledge in an unsupervised framework. Reducts are then used to determine the initial weights of the network, which are further refined using competitive learning. Superiority of this network in terms of quality of clusters, learning time and representation of data is demonstrated quantitatively through experiments over the conventional SOM.