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https://issues.apache.org/jira/browse/MAHOUT-1015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved MAHOUT-1015.
-------------------------------
Resolution: Fixed
Fix Version/s: 0.7
Oops, fixed.
> Precondition check in IRStatisticsImpl broken
> ---------------------------------------------
>
> Key: MAHOUT-1015
> URL: https://issues.apache.org/jira/browse/MAHOUT-1015
> Project: Mahout
> Issue Type: Bug
> Components: Collaborative Filtering
> Affects Versions: 1.0
> Reporter: Robert Jäschke
> Assignee: Sean Owen
> Priority: Minor
> Fix For: 0.7
>
>
> The precondition check in the constructor of
> org.apache.mahout.cf.taste.impl.eval.IRStatisticsImpl includes Copy&Paste
> errors:
> Preconditions.checkArgument(fallOut >= 0.0 && fallOut <= 1.0, "Illegal
> fallOut: " + fallOut);
> Preconditions.checkArgument(fallOut >= 0.0 && fallOut <= 1.0, "Illegal nDCG:
> " + ndcg);
> Preconditions.checkArgument(reach >= 0.0 && reach <= 1.0, "Illegal reach: " +
> ndcg);
> The second line shows a message for nDCG but checks the fallOut, the third
> line checks the reach but prints out the nDCG.
> This error is also in the current version from the SVN
> (http://svn.apache.org/viewvc/mahout/trunk/core/src/main/java/org/apache/mahout/cf/taste/impl/eval/IRStatisticsImpl.java?revision=1213930&view=markup)
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