Note, however, that R-Precision requires the number of gold labels per document to be known beforehand, which is unrealistic in practical applications.
we propose using R-Precision@K (RP @K), where ALL LABELS FREQUENT FEW ZERO RP @5 nDCG@5 Micro-F 1 RP @5 nDCG@5 RP @5 nDCG@5 RP @5 nDCG@  K is a parameter.