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时间:2019-03-08
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1、PatternRecognitionLetters27(2006)861–874www.elsevier.com/locate/patrecAnintroductiontoROCanalysisTomFawcettInstitutefortheStudyofLearningandExpertise,2164StauntonCourt,PaloAlto,CA94306,USAAvailableonline19December2005AbstractReceiveroperatingcharacteristics(ROC)graphsareusefulfororganizin
2、gclassifiersandvisualizingtheirperformance.ROCgraphsarecommonlyusedinmedicaldecisionmaking,andinrecentyearshavebeenusedincreasinglyinmachinelearninganddataminingresearch.AlthoughROCgraphsareapparentlysimple,therearesomecommonmisconceptionsandpitfallswhenusingtheminpractice.Thepurposeofthis
3、articleistoserveasanintroductiontoROCgraphsandasaguideforusingtheminresearch.Ó2005ElsevierB.V.Allrightsreserved.Keywords:ROCanalysis;Classifierevaluation;Evaluationmetrics1.Introductiondomainswithskewedclassdistributionandunequalclas-sificationerrorcosts.ThesecharacteristicshavebecomeArecei
4、veroperatingcharacteristics(ROC)graphisaincreasinglyimportantasresearchcontinuesintotheareastechniqueforvisualizing,organizingandselectingclassifi-ofcost-sensitivelearningandlearninginthepresenceofersbasedontheirperformance.ROCgraphshavelongunbalancedclasses.beenusedinsignaldetectiontheory
5、todepictthetradeoffROCgraphsareconceptuallysimple,buttherearesomebetweenhitratesandfalsealarmratesofclassifiers(Egan,non-obviouscomplexitiesthatarisewhentheyareusedin1975;Swetsetal.,2000).ROCanalysishasbeenextendedresearch.Therearealsocommonmisconceptionsandpit-foruseinvisualizingandanalyzi
6、ngthebehaviorofdiag-fallswhenusingtheminpractice.Thisarticleattemptstonosticsystems(Swets,1988).ThemedicaldecisionmakingserveasabasicintroductiontoROCgraphsandasaguidecommunityhasanextensiveliteratureontheuseofROCforusingtheminresearch.Thegoalofthisarticleistographsfordiagnostictesting(Zo
7、u,2002).Swetsetal.advancegeneralknowledgeaboutROCgraphssoasto(2000)broughtROCcurvestotheattentionofthewiderpromotebetterevaluationpracticesinthefield.publicwiththeirScientificAmericanarticle.OneoftheearliestadoptersofROCgraphsinmachine2.Classifierperformancelearningwas
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