[MAHOUT-603] Standardize implementation of log-likelihood

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.3, 0.4
• Fix Version/s: 0.5
• Labels: collaborative-filtering log-likelihood similarity
• Assignee: Sean R. Owen
• Reporter: Sean R. Owen
• Due: 31/Jan/11
• Created: 31/Jan/11 07:37
• Updated: 31/Jan/24 22:11
• Resolved: 03/Feb/11 12:51

Description

We should use Ted's formulation of log-likelihood instead of the one that exists twice in the CF module. It doesn't change the resulting numbers, though does fix some symmetry issues in corner cases.