What nDCG sees that precision and recall miss
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Two retrieval runs for the same query. Relevant document is D . Run A: [D, x, x, x, x, x, x, x] Run B: [x, x, x, x, x, x, x, D] Precision@8 is identical: one relevant document out of eight, 0.125 both times. Recall@8 is identical: you found the one that existed, 1.0 both times. Hit rate is 1.0 both…
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- 2026-09-09 16:56 · DEV Community — Machine Learning
What nDCG sees that precision and recall miss