U25%(1,16) and U25%(1,168)on《C4.5:programs for machine learning》
whencalculatingUCFU_{CF}UCF(e,N)CF:ConfidenceLevel(hereis25%)e:misclassifyingcountsofcurrentsubtreewefocusonN:countsofsub-datasetsrelevanttocurrentsubtreewhoisunderjudgmentwhethertobeprunedornot.“Pr”i