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Hudson commented on MAHOUT-925: ------------------------------- Integrated in Mahout-Quality #1252 (See [https://builds.apache.org/job/Mahout-Quality/1252/]) MAHOUT-925 Add basic idea of 'reach' srowen : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1213930 Files : * /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/eval/IRStatistics.java * /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/eval/GenericRecommenderIRStatsEvaluator.java * /mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/eval/IRStatisticsImpl.java > Evaluate the reach of recommender algorithms > -------------------------------------------- > > Key: MAHOUT-925 > URL: https://issues.apache.org/jira/browse/MAHOUT-925 > Project: Mahout > Issue Type: Improvement > Components: Collaborative Filtering > Affects Versions: 0.5 > Reporter: Anatoliy Kats > Assignee: Sean Owen > Priority: Minor > Fix For: 0.6 > > Attachments: MAHOUT-925.patch, MAHOUT-925.patch > > Original Estimate: 1h > Remaining Estimate: 1h > > The evaluation of a CF algorithm should include reach, the proportion of > users for whom a recommendation could be made. An algorithm usually has a > cutoff value on the confidence of the recommender, and if it is not high > enough, no recommendation is made. The number of requested recommendations, > or this parameter could be varied as part of the evaluation. The proposed > patch adds this. > My build with this patch breaks > testMapper(org.apache.mahout.classifier.df.mapreduce.partial.Step1MapperTest): > org.apache.mahout.classifier.df.node.Leaf.<init>(I)V . The test seems > unrelated to the patch, so I am assuming this is broken in the trunk head as > well. Unfortunately I am under a deadline, and I do not have time to write > tests for the patch. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira