DATA MINING SYSTEM, DATA MINING METHOD AND DATA MINING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a data mining system that can change the granularity of attributes efficiently without causing a user's trial and error. PSOLUTION: The data mining system includes a grouping means 102 for selecting an attribute from data including a plurality of attributes and attribute values and grouping the attribute values of the selected attribute according to a pre-stored classification hierarchy hierarchically representing a classification corresponding to the attribute, a test statistic calculation means 103 for calculating a test statistic indicating the strength of relevance of the grouped attribute values to an attribute under analysis, and a determination means 104 for determining whether the grouped attribute values are characteristic in terms of relationship to the attribute under analysis according to the calculated test statistic. If the determination means 104 determines that they are not characteristic, the grouping means 102 executes the grouping again according to a level of classification in the classification hierarchy higher than that used in the preceding grouping out of the classification hierarchy. PCOPYRIGHT: (C)2011,JPO&INPIT