Extend ItembasedRecommender to offer different "exclusion modes" when computing
most similar items to a collection of input items
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Key: MAHOUT-558
URL: https://issues.apache.org/jira/browse/MAHOUT-558
Project: Mahout
Issue Type: New Feature
Components: Collaborative Filtering
Affects Versions: 0.5
Reporter: Sebastian Schelter
GenericItembased Recommender currently excludes all items that are not similar
at least one of the input items when computing the most similar items to a
collection of items. We should introduce a way to have the user decide whether
he/she wants this behavior or he/she wants to have all items included that are
similar to at least one of the input items, which is more useful in practice in
my experience.
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