question: public static double P_Harmonic ( int Y [ ] [ ] , int Ypred [ ] [ ] ) { int allMissings = 0 ; int N = Y . length ; double loss = 0.0 ; for ( int i = 0 ; i < N ; i ++ ) { if ( allMissing ( Y [ i ] ) ) { allMissings ++ ; continue ; } double curLoss = P_Harmonic ( Y [ i ] , Ypred [ i ] ) ; if ( Double . isNaN ( curLoss ) ) { allMissings ++ ; continue ; } loss += curLoss ; } return loss / ( double ) ( N - allMissings ) ; }
target:  Harmonic Accuracy -- average over all labels. Multi-label only. 