data mining -concepts and techniques

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1、DataMining:ConceptsandTechniquesConceptDescription:CharacterizationandComparison2021/8/261DataMining:ConceptsandTechniquesChapter5:ConceptDescription:CharacterizationandComparisonWhatisconceptdescription?Datageneralizationandsummarization-basedcharacterizationAnalyticalcharacterizat

2、ion:AnalysisofattributerelevanceMiningclasscomparisons:DiscriminatingbetweendifferentclassesMiningdescriptivestatisticalmeasuresinlargedatabasesDiscussionSummary2021/8/262DataMining:ConceptsandTechniquesWhatisConceptDescription?Descriptivevs.predictivedataminingDescriptivemining:descr

3、ibesdatasetsinconcise,summarative,informative,discriminativeformsPredictivemining:analyzesknowndata,constructsmodelsforthedatabase,andpredictsthetrendandpropertiesofunknowndataConcept/classdescription:aconceptreferstoacollectionofdata,e.g.frequent_buyers,graduate_studentsCharacterizat

4、ion:providesaconciseandsuccinctsummarizationofthegivencollectionofdataComparison/discrimination:providesdescriptionscomparingtwoormorecollectionsofdataConceptDescriptionvs.OLAPConceptdescription:canhandlecomplexdatatypesoftheattributesandtheiraggregationsamoreautomatedprocessOLAP:rest

5、rictedtononnumericdimensionsandnumericmeasuresuser-controlledprocessFutureintegrationisexpected2021/8/264DataMining:ConceptsandTechniquesChapter5:ConceptDescription:CharacterizationandComparisonWhatisconceptdescription?Datageneralizationandsummarization-basedcharacterizationAnalytical

6、characterization:AnalysisofattributerelevanceMiningclasscomparisons:DiscriminatingbetweendifferentclassesMiningdescriptivestatisticalmeasuresinlargedatabasesDiscussionSummary2021/8/265DataMining:ConceptsandTechniquesDataGeneralizationandSummarization-basedCharacterizationDatageneraliz

7、ationAprocesswhichabstractsalargesetoftask-relevantdatainadatabasefromrelativelylowconceptuallevelstohigherones.Approaches:Datacubeapproach(OLAPapproach)Attribute-orientedinductionapproach12345Conceptuallevels2021/8/266DataMining:ConceptsandTechniquesCharacterization:DataCubeApproach(

8、witho