TextCategorization(TC)isataskofclassifyingasetofdocumentsintooneormorepredefinedcategories.Centroid-basedmethod,averypopularTCmethod,aimstomakeclassifierssimpleandefficientbyconstructingoneprototypevectorforeachclass.Itclassifiesadocumentintotheclassthatownstheprototypevectornearesttothedocument.Manystudieshavebeendoneonconstructingprototypevectors.However,thebasicphilosophiesofthesemethodsarequitedifferentfromeachother
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