Discovery-driven exploration of OLAP data cubes
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United States of America Patent
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Jul 25, 2000
Grant Date -
N/A
app pub date -
Aug 22, 1997
filing date -
Aug 22, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for locating data anomalies in a k dimensional data cube that includes the steps of associating a surprise value with each cell of a data cube, and indicating a data anomaly when the surprise value associated with a cell exceeds a predetermined exception threshold. According to one aspect of the invention, the surprise value associated with each cell is a composite value that is based on at least one of a Self-Exp value for the cell, an In-Exp value for the cell and a Path-Exp value for the cell. Preferably, the step of associating the surprise value with each cell includes the steps of determining a Self-Exp value for the cell, determining an In-Exp value for the cell, determining a Path-Exp value for the cell, and then generating the surprise value for the cell based on the Self-Exp value, the In-Exp value and the Path-value.
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