Jeff Eastman created MAHOUT-1030:
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Summary: Regression: Clustered Points Should be
WeightedPropertyVectorWritable not WeightedVectorWritable
Key: MAHOUT-1030
URL: https://issues.apache.org/jira/browse/MAHOUT-1030
Project: Mahout
Issue Type: Bug
Components: Clustering, Integration
Affects Versions: 0.7
Reporter: Jeff Eastman
Looks like this won't make it into this build. Pretty widespread impact on code
and tests and I don't know which properties were implemented in the old
version. I will create a JIRA and post my interim results.
On 6/8/12 12:21 PM, Jeff Eastman wrote:
> That's a reversion that evidently got in when the new
> ClusterClassificationDriver was introduced. It should be a pretty easy fix
> and I will see if I can make the change before Paritosh cuts the release bits
> tonight.
>
> On 6/7/12 1:00 PM, Pat Ferrel wrote:
>> It appears that in kmeans the clusteredPoints are now written as
>> WeightedVectorWritable where in mahout 0.6 they were
>> WeightedPropertyVectorWritable? This means that the distance from the
>> centroid is no longer stored here? Why? I hope I'm wrong because that is not
>> a welcome change. How is one to order clustered docs by distance from
>> cluster centroid?
>>
>> I'm sure I could calculate the distance but that would mean looking up the
>> centroid for the cluster id given in the above WeightedVectorWritable, which
>> means iterating through all the clusters for each clustered doc. In my case
>> the number of clusters could be fairly large.
>>
>> Am I missing something?
>>
>>
>
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