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https://issues.apache.org/jira/browse/MAHOUT-845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13133104#comment-13133104
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Jake Mannix commented on MAHOUT-845:
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Ooh, actually, I have code which does this on my github branch, in fact. I
keep saying that, I really need to merge it over. So you have to be really
careful with Vector.Element instances, as they are often "virtual" - the same
object is reused over and over again if you iterate. So you end up getting
very strange/wrong results if you try to hang onto them.
But I'll take a look at this patch, I agree this functionality is totally
needed (I needed it badly enough I just hacked it into my code) for vectors in
general (have to be careful of negative values though!).
> Make cluster top terms code more reusable
> -----------------------------------------
>
> Key: MAHOUT-845
> URL: https://issues.apache.org/jira/browse/MAHOUT-845
> Project: Mahout
> Issue Type: Improvement
> Components: Clustering
> Affects Versions: 0.5
> Reporter: Frank Scholten
> Priority: Minor
> Fix For: 0.6
>
> Attachments: MAHOUT-845.patch
>
>
> When working with Mahout text clustering I find that I keep writing code
> similar to the contents of
> public static String getTopFeatures(Cluster cluster, String[] dictionary, int
> numTerms)
> in ClusterDumper in order to determine cluster labels.
> I think it would be useful if (parts of) this code are added to the cluster
> or vector API so that you could do something like
> Cluster cluster = ... // get the cluster from seq file iterable
> String clusterLabel = cluster.getTopTerms(1, dictionary); // Do something
> with the label
> I think this would make it easier to export and post-process clustering
> results, like indexing or storing them elsewhere.
> Thoughts?
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