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Date: Thu, 7 Jan 2010 13:30:44 -0800 (PST)
From: diveman <shiliang91@gmail.com>
To: mahout-user@lucene.apache.org
Subject: Re: Kmeans clustering
In-Reply-To: <8f8e14c41001071257j7b88a788h80dfc289ec94b138@mail.gmail.com>
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 <8f8e14c41001071257j7b88a788h80dfc289ec94b138@mail.gmail.com>


Thanks!

and when I try to run the dumper it gives me the following:
hadoop jar mahout-utils-0.3-SNAPSHOT.jar
org.apache.mahout.utils.clustering.ClusterDumper -s output/clusters-6/ -o
/data/output
Exception in thread "main" java.lang.NullPointerException
        at
org.apache.mahout.utils.clustering.ClusterDumper.printClusters(ClusterDumper.java:112)
        at
org.apache.mahout.utils.clustering.ClusterDumper.main(ClusterDumper.java:253)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)


Drew Farris wrote:
> 
> Each iteration of k-means clustering will produce a cluster-X file. In
> this case, there were 7 iterations prior to the clusters converging.
> The final cluster data can be found in clusters-6.
> 
> There is a utility in mahout-util,
> o.a.m.utils.clustering.ClusterDumper that can be used to dump the data
> from clusters-6 and points into a json-like format. You could use that
> code as a starting point for discovering how to get at the data you're
> interested in.
> 
> On Thu, Jan 7, 2010 at 3:23 PM, diveman <shiliang91@gmail.com> wrote:
>>
>> I'm new to Mahout. Installed 0.3 in a 4-node cluster and run mahout kmean
>> example with syntheticcontrol data. I got outputs like the following:
>>
>> output/canopies
>> output/clusters-0
>> output/clusters-1
>> output/clusters-2
>> output/clusters-3
>> output/clusters-4
>> output/clusters-5
>> output/clusters-6
>> output/data
>> output/points
>>
>> by which I understand in the points folder, each point is labeled with a
>> cluster id. I'm wondering where I can find the cluster center, radius
>> info,
>> etc. And what's in clusters-0~6? BTW, the sample data has 6 groups and
>> the
>> result has 7 clusters, any clue?
>>
>> Thanks!
>> --
>> View this message in context:
>> http://old.nabble.com/Kmeans-clustering-tp27066415p27066415.html
>> Sent from the Mahout User List mailing list archive at Nabble.com.
>>
>>
> 
> 

-- 
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