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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