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Summary Grids: Building Accurate Multidimensional Histograms.

Pedro Furtado, Henrique Madeira: Summary Grids: Building Accurate Multidimensional Histograms. DASFAA 1999: 187-194
@inproceedings{DBLP:conf/dasfaa/FurtadoM99,
  author    = {Pedro Furtado and
               Henrique Madeira},
  editor    = {Arbee L. P. Chen and
               Frederick H. Lochovsky},
  title     = {Summary Grids: Building Accurate Multidimensional Histograms},
  booktitle = {Database Systems for Advanced Applications, Proceedings of the
               Sixth International Conference on Database Systems for Advanced
               Applications (DASFAA), April 19-21, Hsinchu, Taiwan},
  publisher = {IEEE Computer Society},
  year      = {1999},
  isbn      = {0-7695-0084-6},
  pages     = {187-194},
  ee        = {db/conf/dasfaa/FurtadoM99.html},
  crossref  = {DBLP:conf/dasfaa/99},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

Data summarization is very important for many data analysis tasks. In this paper we propose a simple but efficient data summarization algorithm, which outputs a histogram for multidimensional data, and make a comparative study of its usage with different distributions and with existing algorithms. The idea is to iteratively grow and modify regions of homogeneous data. This is a different strategy from a commonly used strategy of iteratively fracturing subspaces using straight lines. This work compares both strategies and concludes that the new technique is better and helds good results. We also concluded that discriminate handling of outliers is important to provide good approximates.

Copyright © 1999 by The Institute of Electrical and Electronic Engineers, Inc. (IEEE). Abstract used with permission.


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