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https://issues.apache.org/jira/browse/MAHOUT-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Trevor Grant resolved MAHOUT-2030.
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Resolution: Won't Fix
Jira Cleanup 1/31/24
> Add DCG and nDCG metrics (rank) evaluator
> -----------------------------------------
>
> Key: MAHOUT-2030
> URL: https://issues.apache.org/jira/browse/MAHOUT-2030
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Reporter: Marta Raczynska
> Priority: Minor
>
> Add common ranking metrics evaluator:
> * Discounted cumulative gain (DCG)
> * Normalized discounted cumulative gain (nDCG)
> This implementation attempts to create a new class:
> *org.apache.mahout.cf.taste.impl.eval.DCGRecommenderEvaluator* which
> implements *org.apache.mahout.cf.taste.eval.RecommenderEvaluator*.
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