Thanks for the help, I will check the tool, so I know there is no such an
interface on Cluster where i can find the points <--> cluster mapping, it saves
my time. Cheers Ramon
> Date: Thu, 3 Nov 2011 11:26:03 +0200
> From: [email protected]
> To: [email protected]
> Subject: Re: How to find which point belongs which cluster after running
> KMeansClusterer
>
> Pe 03.11.2011 10:53, WangRamon a scris:
> >
> >
> >
> >
> > Hi All I'm using KMeansClusterer, I will use KMeansDriver on a Hadoop
> > environment later, but I think it will be easy to understand it by using
> > KMeansClusterer, OK, so the question is i cannot find a way to find the
> > cluster a point should belong to after running KMeansClusterer, I expect I
> > can get some API on the Cluster interface to get all points/vector belong
> > to this cluster, but... so did i miss something? Thanks a lot. Cheers
> > Ramon
>
> You can find your answer in the clusterDumper utility. Check the code at
> [1]. I have modified printCluster method to suppress some info and print
> the cluster points with something like:
>
> String clusterInfo = String.format("Cluster %d (%d) with %d points.\n",
> value.getId(), clusterCount, value.getNumPoints());
>
> List<WeightedVectorWritable> points = clusterIdToPoints.get(value.getId());
> if (points != null) {
> writer.write("\tCluster points:\n\t");
> for (Iterator<WeightedVectorWritable> iterator =
> points.iterator(); iterator.hasNext();) {
> WeightedVectorWritable point = iterator.next();
> writer.write(String.valueOf(point.getWeight()));
> writer.write(": ");
>
> if (point.getVector() instanceof NamedVector) {
> writer.write(((NamedVector)
> point.getVector()).getName() + " ");
> }
>
> }
> writer.write('\n');
> }
>
>
> [1]
> http://grepcode.com/file/repo1.maven.org/maven2/org.apache.mahout/mahout-utils/0.2/org/apache/mahout/utils/clustering/ClusterDumper.java
> [2] https://cwiki.apache.org/MAHOUT/cluster-dumper.html
>
> --
> Ioan Eugen Stan
> Big Data Solutions Development Romania
>
> 1&1 Internet Development SRL
>
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> Sect 1, Bucuresti Tel : +40 312 23-9254
> 012015, Romania EMail: [email protected]
