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Quality of Quantization and Visualization of Vectors Obtained by Neural Gas and Self-Organizing Map
Volume 22, Issue 1 (2011), pp. 115–134
Olga Kurasova   Alma Molytė  

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https://doi.org/10.15388/Informatica.2011.317
Pub. online: 1 January 2011      Type: Research Article     

Received
1 October 2009
Accepted
1 October 2010
Published
1 January 2011

Abstract

In this paper, the quality of quantization and visualization of vectors, obtained by vector quantization methods (self-organizing map and neural gas), is investigated. A multidimensional scaling is used for visualization of multidimensional vectors. The quality of quantization is measured by a quantization error. Two numerical measures for proximity preservation (Konig's topology preservation measure and Spearman's correlation coefficient) are applied to estimate the quality of visualization. Results of visualization (mapping images) are also presented.

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Keywords
self-organizing map neural gas multidimensional scaling quantization error proximity preservation Konig's measure Spearman's rho

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INFORMATICA

  • Online ISSN: 1822-8844
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