This allows a user to judge eg whether the search

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Unformatted text preview: enters. Self-organizing maps, as discussed above, are an An Example: Visualization Using Self-Organizing Maps Band 20 – 2005 49 Hotho, Nürnberger, and Paaß alternative approach which is frequently used in data analysis to cluster high dimensional data. The resulting clusters are arranged in a low-dimensional topology that preserves the neighborhood relations of the corresponding high dimensional data vectors and thus not only objects that are assigned to one cluster are similar to each other, but also objects of nearby clusters are expected to be more similar than objects in more distant clusters. Usually, two-dimensional arrangements of squares or hexagons are used for the definition of the neighborhood relations. Although other topologies are possible for self-organizing maps, two-dimensional maps have the advantage of intuitive visualization and thus good exploration possibilities. In document retrieval, self-organizing maps can be used to arrange documents based on their similarity. This approach opens up several appealing navigation possibilities. Most important, the surrounding grid cells of documents known to be interes...
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