New PDF release: Data mining : a knowledge discovery approach

By Krzysztof J Cios; et al

ISBN-10: 0387333339

ISBN-13: 9780387333335

ISBN-10: 0387367950

ISBN-13: 9780387367958

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Although computation of the distance between two numerical values is straightforward, performing the same computation between two nominal values (such as “white” and “red”, or “chest pain of typ 1” and “chest pain of type 4”) requires special attention. In other words, how can we measure distance between colors (this could be done using chromaticity diagrams) or distance between chest pain types (this is much more difficult)? In some cases, it might be impossible to calculate such a distance. 2.

8. World Wide Web The World Wide Web (WWW) is an enormous distributed repository of data that is linked together via the use of hyperlinks. The hyperlinks link together individual data objects of possibly different types, allowing for interactive access to the information. The most specific characteristic of the WWW is that users seek information traversing between objects via links. , AltaVista, and Prodigy. Finally, a comment on heterogeneous databases. These consist of a set of interconnected databases that communicate between themselves in order to exchange data and provide answers to user queries.

4. Spatial Databases Spatial databases are designed to handle spatially related data. Example data includes geographical maps, satellite images, medical images, and VLSI chip-design data. Spatial data can be represented in two ways: in a raster format and in a vector format. , and using vectorbased geometry to compute relations between the objects. Spatial databases allow the user to obtain unique information about the stored data. For instance, for the heart clinic, we can ask whether patients living in a specific neighborhood are more susceptible to certain heart conditions, or whether the clinic accepts more patients from the north side than from the south side of town.

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Data mining : a knowledge discovery approach by Krzysztof J Cios; et al


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