Andrey Davydov created MAHOUT-1130:
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Summary: Wrong logic in
org.apache.mahout.clustering.kmeans.RandomSeedGenerator
Key: MAHOUT-1130
URL: https://issues.apache.org/jira/browse/MAHOUT-1130
Project: Mahout
Issue Type: Bug
Environment: mahout 0.7 from maven central
Reporter: Andrey Davydov
There is following code in line 101:
} else if (random.nextInt(currentSize + 1) != 0) { // with chance
1/(currentSize+1) pick new element
but it actually means pick new element with chance currentSize/(currentSize+1)
so generator takes initial centers from the end of source data file.
It seems that chance of replace vector in output set should decrease with
number of processed input vectors
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