rrf
Reciprocal Rank Fusion method.
This method combines different search results into a single ranked list by combining their ranks. This is especially well suited when combining hits computed via different methods, whose score distributions are hardly comparable.
Return
a TopDocs contains the top N ranked results.
Parameters
topN
the top N results to be returned
k
a constant determines how much influence documents in individual rankings have on the final result. A higher value gives lower rank documents more influence. k should be greater than or equal to 1.
hits
a list of TopDocs to apply RRF on