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The 7th International Symposium on Intelligent Data Analysis

Relational Topographic Maps

author: Alexander Hasenfuss, Clausthal University of Technology

Description

We introduce relational variants of neural topographic maps including the self-organizing map and neural gas, which allow clustering and visualization of data given as pairwise similarities or dissimilarities with continuous prototype updates. It is assumed that the (dis-)similarity matrix originates from Euclidean distances, however, the underlying embedding of points is unknown.Batch optimization schemes for topographic map formations are formulated in terms of the given (dis-)similarities and convergence is guaranteed, thus providing a way to transfer batch optimization to relational data.

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Slides
0:00 Relational Topographic Maps
0:03 Outline
0:37 Prototype-Based Methods - A Brief Introduction
0:39 Prototype-Based Methods
1:55 Vector Quantization
2:40 Neural Gas
5:03 Median Batch Neural Gas/SOM - General Proximity Data
5:13 Median Variants
6:36 Relational Methods - Continuous Prototype Updates
6:50 Relational Methods pt 1
8:34 Relational Methods pt 2
9:46 Experimental Results - Does It Really Work?!
9:49 Experiments pt 1
10:43 Experiments pt 2
11:47 Experiments pt 3
12:27 Experiments pt 4
12:43 Experiments pt 5
13:31 Summary - Collecting the Pieces
13:32 Summary

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