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Sean Owen commented on MAHOUT-559:
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Sounds good, let me review and perhaps tweak a few things (copyright headers, formatting,
etc.) and commit
> Compare Recommender output by order of recommendations.
> -------------------------------------------------------
>
> Key: MAHOUT-559
> URL: https://issues.apache.org/jira/browse/MAHOUT-559
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Reporter: Lance Norskog
> Attachments: OrderBasedRecommenderEvaluator.patch
>
>
> The existing RecommenderEvaluator (AverageAbsoluteDifferenceRecommenderEvaluator.java)
has a very limited API. It evaluates a Recommender's performance on a training v.s. test scenario.
It does not allow comparing the outputs of different recommenders against the same data model.
Also, I could not figure out how its comparison criteria.
> OrderBasedRecommenderEvaluator compares the output of two recommenders. It only checks
the order of the items in the recommendations, ignoring the returned preference values.
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