[MAHOUT-902] TanimotoCoefficientSimilarity should return Double.NaN for two items that have zero overlap

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.6
• Fix Version/s: 0.6
• Component/s: Collaborative Filtering
• Labels: MAHOUT_INTRO_CONTRIBUTE
• Assignee: Sean R. Owen
• Reporter: Sebastian Schelter
• Created: 29/Nov/11 13:12
• Updated: 09/Feb/12 14:01
• Resolved: 05/Dec/11 17:54

Description

org.apache.mahout.cf.taste.impl.similarity.TanimotoCoefficientSimilarity should return Double.NaN for two items that have zero overlap. Please also provide a unit-test for this.