Adam Ilardi created MAHOUT-1453:
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Summary: ImplicitFeedbackAlternatingLeastSquaresSolver add support
for user supplied confidence functions
Key: MAHOUT-1453
URL: https://issues.apache.org/jira/browse/MAHOUT-1453
Project: Mahout
Issue Type: Improvement
Components: Collaborative Filtering
Affects Versions: 0.9
Reporter: Adam Ilardi
Assignee: Sebastian Schelter
Priority: Minor
Fix For: 1.0
I added a test case for the YtY calculation code
I removed the indexes.quickSort() in the YtY calculation because I don't think
it's necessary and the test cases passed without it. The order shouldn't matter
since you're adding the scalers together. Correct me if i'm wrong.
In Factorization.java I added methods to access the iterator of item ids and
user ids directly. This saves memory when using classes like TopItems.java when
you don't have the DataModel class in memory as well.
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