Helper function for document-wise computation of ranked retrieval scores

Helper function for document-wise computation of ranked retrieval scores DCG, NDCG and LRAP. Implemented as in Annif https://github.com/NatLibFi/Annif/blob/master/annif/eval.py. Reference implementation of DCG to test against.

dcg_score(gold_vs_pred, limit = NULL)

Arguments

gold_vs_pred

A data.frame as generated by create_comparison.

limit

An integer cutoff value for DCG@N.

Value

The numeric value of DCG.