[MAHOUT-1255] Change BallKMeans weighting to use log(weight)

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.8
• Fix Version/s: 0.8
• Assignee: Dan Filimon
• Reporter: Dan Filimon
• Created: 11/Jun/13 20:31
• Updated: 03/Feb/14 08:05
• Resolved: 16/Jun/13 17:04

Description

Weirdness is happening in the reducer when doing k-means++ sampling by weights.

Change from multiplying the probability with the weight to multiplying by 2 * log(weight).